Master Electrical Component List. GMC Truck TopKick C-Series (Crew) C4/C5 2003

Air Brake Dryer

On the inboard side of the right frame rail

Air Brake System Component Views in Air Brakes

Air Brake System Connector End Views in Air Brakes

Air Compressor (K16)

Behind the cab at the outboard left frame rail

Engine Exhaust Brake Component Views in Engine Exhaust

Engine Exhaust Brake Connector End Views in Engine Exhaust

Air Compressor (K16)

Behind the cab at the outboard left frame rail, on the side of the air compressor

Engine Exhaust Brake Component Views in Engine Exhaust

Engine Exhaust Brake Connector End Views in Engine Exhaust

Air Heater Terminal

Under the I/P between the bulkhead and the glove compartment

•	Engine Controls Component Views in Engine Controls - 7.8L

•	Engine Controls Component Views in Engine Controls - 7.2L (Caterpillar)

•	Engine Controls Connector End Views in Engine Controls - 7.8L

•	Engine Controls Connector End Views in Engine Controls - 7.2L (Caterpillar)

Air Suspension Dump Switch (G40/G45/GSJ)

Center of the I/P, below the gage center, in the I/P switchbank

Suspension Controls Component Views in Air Suspension

Suspension Controls Connector End Views in Air Suspension

Air Suspension Dump Valve Solenoid (G40/G45/GSJ)

On the inboard right frame rail, rear of the axle, in the air suspension dump valve

Suspension Controls Component Views in Air Suspension

Suspension Controls Connector End Views in Air Suspension

Air Temperature Actuator

Behind the right side of the I/P on the HVAC module near the engine cover

HVAC Component Views in HVAC Systems - Manual

HVAC Connector End Views in HVAC Systems - Manual

Automatic Transmission Fluid Temperature (TFT) Gage (Allison® UTX)

Center of the I/P, above the I/P switchbank, in the gage center

Instrument Panel, Gages, and Console Component Views in Instrument Panel, Gages, and Console

Instrument Panel, Gages, and Console Connector End Views in Instrument Panel, Gages, and Console

Automatic Transmission Fluid Temperature (TFT) Gage Lamp (Allison® UTX)

Behind the center of the I/P, above the I/P switchbank, in the gage center, part of the gage assembly

Lighting Systems Component Views in Lighting Systems

Lighting Systems Connector End Views in Lighting Systems

Automatic Transmission Fluid Temperature (TFT) Sensor (Allison® LCT/UTX)

Right lower part of the radiator, on the transmission cooler line

Automatic Transmission Electronic Component Views in Automatic Transmission-Allison

Automatic Transmission Related Connector End Views in Automatic Transmission-Allison

Automatic Transmission Input Shaft Speed (AT ISS) Sensor

On the automatic transmission on the top left side

Automatic Transmission Electronic Component Views in Automatic Transmission-Allison

Automatic Transmission Related Connector End Views in Automatic Transmission-Allison

Automatic Transmission Input Shaft Speed (AT ISS) Sensor (Allison® LCT)

On the upper left side of the transmission, on the transmission bell housing

•	Engine Controls Component Views in Engine Controls - 8.1L

•	Engine Controls Component Views in Engine Controls - 6.6L (LB7)

•	Engine Controls Connector End Views in Engine Controls - 8.1L

•	Engine Controls Connector End Views in Engine Controls - 6.6L (LB7)

Automatic Transmission Shift Lever Position Indicator (Allison® LCT)

In the center console, part of the automatic transmission shift lever

Automatic Transmission Electronic Component Views in Automatic Transmission-Allison

Automatic Transmission Related Connector End Views in Automatic Transmission- Allison

Automatic Transmission Shift Selector (Allison® MD)

On the left side of the center console housing, at the top

Automatic Transmission Electronic Component Views in Automatic Transmission-Allison

Automatic Transmission Related Connector End Views in Automatic Transmission- Allison

Automatic Transmission

In the engine compartment attached to the engine

Automatic Transmission Electronic Component Views in Automatic Transmission-Allison

Automatic Transmission Related Connector End Views in Automatic Transmission-Allison

Auxiliary Power Outlet

In the center of the I/P

Backup Alarm (UZF)

On the back of the rear crossmember, on a bracket

Instrument Panel, Gages, and Console Component Views in Instrument Panel, Gages, and Console

Instrument Panel, Gages, and Console Connector End Views in Instrument Panel, Gages, and Console

Backup Lamp Switch

On the rear of the transmission

Lighting Systems Component Views in Lighting Systems

Lighting Systems Connector End Views in Lighting Systems

Blower Motor - Auxiliary (C36)

Under the rear seat to the right rear of the cab

HVAC Component Views in HVAC Systems - Manual

HVAC Connector End Views in HVAC Systems - Manual

Blower Motor Relay - Auxiliary (C36)

Under the rear seat to the right rear of the cab mounted to the blower motor - auxiliary

HVAC Component Views in HVAC Systems - Manual

HVAC Connector End Views in HVAC Systems - Manual

Blower Motor Resistor Assembly (C40/C60)

In the right rear of the engine compartment in the HVAC module in back of the fuse block - underhood

HVAC Component Views in HVAC Systems - Manual

HVAC Connector End Views in HVAC Systems - Manual

Brake Booster Pump Inline Fuse

In the engine compartment left side under the brake master cylinder

Hydraulic Brake Component Views in Hydraulic Brakes

Hydraulic Brake Connector End Views in Hydraulic Brakes

Brake Fluid Level Switch

Mounted to the brake master cylinder reservoir

Hydraulic Brake Component Views in Hydraulic Brakes

Hydraulic Brake Connector End Views in Hydraulic Brakes

Brake Lamp Relay

In the I/P fuse block

Lighting Systems Component Views in Lighting Systems

Lighting Systems Connector End Views in Lighting Systems

Brake Pressure Modulator Valve (BPMV) - RF

On the right side and to the front of the front crossmember

Antilock Brake System Component Views in Antilock Brake System

Antilock Brake System Connector End Views in Antilock Brake System

Brake Pressure Modulator Valve (BPMV) - RR

On the rear frame center crossmember in front of the axle

Antilock Brake System Component Views in Antilock Brake System

Antilock Brake System Connector End Views in Antilock Brake System

Brake Pressure Modulator Valve (BPMV) - LF

On the left front of the front cross member

Antilock Brake System Component Views in Antilock Brake System

Antilock Brake System Connector End Views in Antilock Brake System

Brake Pressure Modulator Valve (BPMV) - LR

On the rear frame center crossmember in front of the axle

Antilock Brake System Component Views in Antilock Brake System

Antilock Brake System Connector End Views in Antilock Brake System

Camshaft Position (CMP) Sensor

On the front left of the engine compartment

Engine Controls Component Views in Engine Controls - 8.1L

Engine Controls Connector End Views in Engine Controls - 8.1L

Center High Mounted Stop Lamp Relay

In the I/P fuse block

Lighting Systems Component Views in Lighting Systems

Lighting Systems Connector End Views in Lighting Systems

Chime Module (UL5/UXZ)

Behind the left side of the I/P above the accelerator pedal

Instrument Panel, Gages, and Console Component Views in Instrument Panel, Gages, and Console

Instrument Panel, Gages, and Console Connector End Views in Instrument Panel, Gages, and Console

Cigar Lighter (DT4)

On the center console

Clearance Lamp - Left

On top of the roof, on the forward left outboard side of the cab

Lighting Systems Component Views in Lighting Systems

Lighting Systems Connector End Views in Lighting Systems

Clearance Lamp - Right

On top of the roof, on the forward right outboard side of the cab

Lighting Systems Component Views in Lighting Systems

Lighting Systems Connector End Views in Lighting Systems

Clutch Pedal Position (CPP) Switch

On the clutch pedal

Engine Electrical Component Views in Engine Electrical

Engine Electrical Connector End Views in Engine Electrical

Clutch Switch

On the clutch pedal

•	Engine Controls Component Views in Engine Controls - 8.1L

•	Engine Controls Component Views in Engine Controls - 6.6L (LB7)

•	Engine Controls Component Views in Engine Controls - 7.8L

•	Engine Controls Component Views in Engine Controls - 7.2L (Caterpillar)

•	Engine Controls Connector End Views in Engine Controls - 8.1L

•	Engine Controls Connector End Views in Engine Controls - 6.6L (LB7)

•	Engine Controls Connector End Views in Engine Controls - 7.8L

•	Engine Controls Connector End Views in Engine Controls - 7.2L (Caterpillar)

Controller Area Network (CAN) Connector

On the lower left side of the I/P, left of the lower steering column, by the data link connector (DLC)

Data Link Communications Component Views in Data Link Communications

Data Link Communications Connector End Views in Data Link Communications

Coolant Bypass Valve Solenoid (C36)

Under the cab below the right rear seat

HVAC Component Views in HVAC Systems - Manual

HVAC Connector End Views in HVAC Systems - Manual

Coolant Level Switch

On the left side of the radiator on the lower left bottom side of the radiator surge tank

•	Engine Controls Component Views in Engine Controls - 8.1L

•	Engine Controls Component Views in Engine Controls - 6.6L (LB7)

•	Engine Controls Component Views in Engine Controls - 7.8L

•	Engine Controls Component Views in Engine Controls - 7.2L (Caterpillar)

•	Engine Controls Connector End Views in Engine Controls - 8.1L

•	Engine Controls Connector End Views in Engine Controls - 6.6L (LB7)

•	Engine Controls Connector End Views in Engine Controls - 7.8L

•	Engine Controls Connector End Views in Engine Controls - 7.2L (Caterpillar)

Cooling Fan Control

In the engine compartment

•	Engine Controls Component Views in Engine Controls - 7.8L

•	Engine Controls Component Views in Engine Controls - 7.2L (Caterpillar)

•	Engine Controls Connector End Views in Engine Controls - 7.8L

•	Engine Controls Connector End Views in Engine Controls - 7.2L (Caterpillar)

Courtesy/Reading Lamps Front

In the headliner

Lighting Systems Component Views in Lighting Systems

Lighting Systems Connector End Views in Lighting Systems

Crankshaft Position (CKP) Sensor

On the front of the engine at the bottom of the timing chain lever

Engine Controls Component Views in Engine Controls - 8.1L

Engine Controls Connector End Views in Engine Controls - 8.1L

Cruise Control ON/OFF Switch

On the left side of the steering column on the multifunction switch

Cruise Control Component Views in Cruise Control

DLC Resistor Terminator

Part of the I/P harness

Data Link Communications Component Views in Data Link Communications

Data Link Communications Connector End Views in Data Link Communications

Data Link Connector (DLC)

On the lower left side of the I/P, left of the lower steering column, by the controller area network (CAN) connector

Data Link Communications Component Views in Data Link Communications

Data Link Communications Connector End Views in Data Link Communications

Daytime Running Lights (DRL) Diode

Under the right side of the IPC above the DLC

Lighting Systems Component Views in Lighting Systems

Lighting Systems Connector End Views in Lighting Systems

Daytime Running Lights (DRL) Module

Left of the I/P, behind the headlamp switch

Lighting Systems Component Views in Lighting Systems

Lighting Systems Connector End Views in Lighting Systems

Daytime Running Lights (DRL) Relay

On the right side of the I/P under the access cover

Lighting Systems Component Views in Lighting Systems

Lighting Systems Connector End Views in Lighting Systems

Diagnostic Tool Connector (CAN)

On the lower left side of the I/P, left of the lower steering column, by the data link connector (DLC)

Data Link Communications Component Views in Data Link Communications

Data Link Communications Connector End Views in Data Link Communications

Differential Lock Switch (HNB/HPL/HPN)

On the left side of the interior bulkhead, behind the I/P, on the air brake supply manifold

Rear Axle Component Views in Drive Axle - Locking/Limited Slip

Rear Axle Connector End Views in Drive Axle - Locking/Limited Slip

Differential Lock Switch Lamp (HNB/HPL/HPN)

Behind the center of the I/P, below the gage center, in the I/P switchbank, part of the pneumatic switch

Lighting Systems Component Views in Lighting Systems

Lighting Systems Connector End Views in Lighting Systems

Dome and Reading Lamps

In the headliner

Lighting Systems Component Views in Lighting Systems

Lighting Systems Connector End Views in Lighting Systems

Door Jamb Switch-LF

On the left front door jamb

Door Jamb Switch-LR

On the left rear door jamb

Door Jamb Switch-RR

On the right rear door jamb

Door Jamb Switch-RF

On the right front door jamb

Door Lock Actuator-Driver

On the left front door lock latch assembly

Door Lock Actuator-LR

On the left front door

Door Lock Actuator-Passenger

On the right front door lock latch assembly

Door Lock Relay

Behind the center of the I/P against the fire wall

Door Lock Switch-Driver

On the left front door trim panel armrest

Door Lock Switch-Passenger

On the right front trim panel

Driver Information Center (DIC)

Center of the I/P, left of the I/P switchbank

Instrument Panel, Gages, and Console Component Views in Instrument Panel, Gages, and Console

Instrument Panel, Gages, and Console Connector End Views in Instrument Panel, Gages, and Console

Electronic Brake Control Module (EBCM)

on the front left frame rail behind the wheel well

•	Air Antilock Brake System Component Views in Air Antilock Brake System

•	Antilock Brake System Component Views in Antilock Brake System

•	Air Antilock Brake System Connector End Views in Air Antilock Brake System

•	Antilock Brake System Connector End Views in Antilock Brake System

Engine Control Module (ECM) (LG4)

Center of the I/P behind the HVAC controller

Engine Controls Component Views in Engine Controls - 7.8L

Engine Control Module Connector End Views in Engine Controls - 7.8L

Engine Control Module (ECM)

In the engine compartment on the left side of the bulkhead

•	Engine Controls Component Views in Engine Controls - 6.6L (LB7)

•	Engine Controls Component Views in Engine Controls - 7.2L (Caterpillar)

•	Engine Control Module Connector End Views in Engine Controls - 6.6L (LB7)

•	Engine Controls Connector End Views in Engine Controls - 7.2L (Caterpillar)

Engine Coolant Temperature (ECT) Sensor

On the right side of the engine to the rear of the coolant outlet

Engine Controls Component Views in Engine Controls - 8.1L

Engine Controls Connector End Views in Engine Controls - 8.1L

Engine Oil Level Switch

On the lower right side of the engine, near the center, in the oil pan

Instrument Panel, Gages, and Console Component Views in Instrument Panel, Gages, and Console

Instrument Panel, Gages, and Console Connector End Views in Instrument Panel, Gages, and Console

Engine Oil Pressure (EOP) Sensor

Mounted in the right center side of the engine block (LG4) on the lower side of the engine (LB7)

•	Engine Controls Component Views in Engine Controls - 7.8L

•	Engine Controls Component Views in Engine Controls - 6.6L (LB7)

•	Engine Controls Connector End Views in Engine Controls - 7.8L

•	Engine Controls Connector End Views in Engine Controls - 6.6L (LB7)

Ether Solenoid

In the engine compartment near the cowl

Engine Controls Component Views in Engine Controls - 7.2L (Caterpillar)

Engine Controls Connector End Views in Engine Controls - 7.2L (Caterpillar)

Evaporative Emission (EVAP) Canister Purge Solenoid Valve (L18)

In the engine compartment on the left side of the bulkhead

Engine Controls Component Views in Engine Controls - 8.1L

Engine Controls Connector End Views in Engine Controls - 8.1L

Exhaust Brake Actuator Control Solenoid Valve (K40/NPE)

On the inside of the right frame rail behind the shock absorber

Engine Exhaust Brake Component Views in Engine Exhaust

Engine Exhaust Brake Connector End Views in Engine Exhaust

Exhaust Brake Relay (K40/NPE)

In the engine compartment on the right side of the fan shroud

Engine Exhaust Brake Component Views in Engine Exhaust

Engine Exhaust Brake Connector End Views in Engine Exhaust

Exhaust Brake Switch (K40)

Center of the I/P, below the gage center, in the I/P switchbank

Engine Exhaust Brake Component Views in Engine Exhaust

Engine Exhaust Brake Connector End Views in Engine Exhaust

Exhaust Gas Recirculation (EGR) Valve (L18)

On the back center of the engine above the transmission bell housing

Engine Controls Component Views in Engine Controls - 8.1L

Engine Controls Connector End Views in Engine Controls - 8.1L

Fuel Injector Control Module (FICM)

On the right front of the engine

Engine Controls Component Views in Engine Controls - 6.6L (LB7)

Engine Controls Connector End Views in Engine Controls - 6.6L (LB7)

Fuel Injectors 1-8

On top of the engine above the injector

Engine Controls Component Views in Engine Controls - 6.6 L (LB7)

Engine Controls Connector End Views in Engine Controls - 6.6L (LB7)

Fuel Pump (FP) Relay

In the underhood fuse block

Fuel Pump and Sender Assembly

In the fuel tank that is mounted to the left frame rail

Instrument Panel, Gages, and Console Component Views in Instrument Panel, Gages, and Console

Engine Controls Component Views in Engine Controls - 8.1L

Instrument Panel, Gages, and Console Connector End Views in Instrument Panel, Gages, and Console

Engine Controls Connector End Views in Engine Controls - 8.1L

Fuel Pump Relay-Secondary

On the crossmember behind the cab

Engine Controls Component Views in Engine Controls - 8.1L

Engine Controls Connector End Views in Engine Controls - 8.1L

Fuel Pump Relay

On the right side of the I/P under the access cover

Fuel Rail Pressure (FPR) Sensor

Top left of the engine

Engine Controls Component Views in Engine Controls - 6.6L (LB7)

Engine Controls Connector End Views in Engine Controls - 6.6L (LB7)

Fuel Sender-Primary

In the left fuel tank

Engine Controls Component Views in Engine Controls - 6.6L (LB7)

Engine Controls Connector End Views in Engine Controls - 6.6L (LB7)

Fuel Sender-Secondary

In the right fuel tank

•	Engine Controls Component Views in Engine Controls - 8.1L

•	Engine Controls Component Views in Engine Controls - 6.6L (LB7)

•	Engine Controls Component Views in Engine Controls - 7.8L

•	Engine Controls Connector End Views in Engine Controls - 8.1L

•	Engine Controls Connector End Views in Engine Controls - 6.6L (LB7)

•	Engine Controls Connector End Views in Engine Controls - 7.8L

Fuel Tank Transfer Pump-Secondary

On the inboard side of the left frame rail between tanks

•	Engine Controls Component Views in Engine Controls - 8.1L

•	Engine Controls Component Views in Engine Controls - 6.6L (LB7)

•	Engine Controls Connector End Views in Engine Controls - 8.1L

•	Engine Controls Connector End Views in Engine Controls - 6.6L (LB7)

Fuel Temperature Sensor

Top left rear of the engine

Engine Controls Component Views in Engine Controls - 7.8L

Engine Controls Connector End Views in Engine Controls - 7.8 L

Fuse Block I/P

Right side of the I/P under the access cover

Fuse Block - Underhood (Primary)

Top back right of the engine compartment

Fuse Block-Underhood (Secondary)

Top back right of the engine compartment

Fuse Block -- I/P

Right side of the I/P under the access cover

Generator (Right)

Mounted to the right front of the engine

Engine Electrical Component Views in Engine Electrical

Engine Electrical Connector End Views in Engine Electrical

Generator (Left)

Mounted to the right front of the engine

Engine Electrical Component Views in Engine Electrical

Engine Electrical Connector End Views in Engine Electrical

Glow Plug Relay

In the engine compartment on the cowl

Engine Controls Component Views in Engine Controls - 7.8 L

Engine Controls Connector End Views in Engine Controls - 7.8L

Hazard Switch

Top of the upper steering column, part of the turn signal/multifunction switch

Headlamp-High Beam-Left

On the front left of the vehicle

Lighting Systems Component Views in Lighting Systems

Lighting Systems Connector End Views in Lighting Systems

Headlamp-High/Low Beam-Right (HPR)

Right front of the vehicle

Lighting Systems Component Views in Lighting Systems

Lighting Systems Connector End Views in Lighting Systems

Headlamp-High/Low Beam-Left (HPR)

Left front of the vehicle

Lighting Systems Component Views in Lighting Systems

Lighting Systems Connector End Views in Lighting Systems

Headlamp-Left

On the front left of the vehicle

Lighting Systems Component Views in Lighting Systems

Lighting Systems Connector End Views in Lighting Systems

Headlamp-Right

Front right of the vehicle

Lighting Systems Component Views in Lighting Systems

Lighting Systems Connector End Views in Lighting Systems

Headlamp Switch

Left side of the I/P, below the HVAC air outlet

Lighting Systems Component Views in Lighting Systems

Lighting Systems Connector End Views in Lighting Systems

Heated Fuel Relay

In the I/P fuse block

Engine Controls Component Views in Engine Controls - 6.6L (LB7)

Engine Controls Connector End Views in Engine Controls - 6.6L (LB7)

Heated Fuel Relay

In the I/P fuse block

Engine Controls Component Views in Engine Controls - 7.8L

Engine Controls Connector End Views in Engine Controls - 7.8L

Heated Oxygen Sensor (HO2S) Bank 1 (L18)

On the left exhaust pipe below the exhaust manifold

Engine Controls Component Views in Engine Controls - 8.1L

Engine Controls Connector End Views in Engine Controls - 8.1L

Heated Oxygen Sensor (HO2S) Bank 2 (L18)

On the right exhaust pipe below the exhaust manifold

Engine Controls Component Views in Engine Controls - 8.1L

Engine Controls Connector End Views in Engine Controls - 8.1L

Heated/Water in Fuel

Inside the fuel tank

Engine Controls Component Views in Engine Controls - 7.2L (Caterpillar)

Engine Controls Connector End Views in Engine Controls - 7.2L (Caterpillar)

High Idle Switch (UF3)

Center of the I/P, below the gage center, in the I/P switchbank

•	Engine Controls Component Views in Engine Controls - 7.2L (Caterpillar)

•	Engine Controls Component Views in Engine Controls - 8.1L

•	Engine Controls Component Views in Engine Controls - 6.6L (LB7)

•	Engine Controls Component Views in Engine Controls - 7.8L

•	Engine Controls Connector End Views in Engine Controls - 7.2L (Caterpillar)

•	Engine Controls Connector End Views in Engine Controls - 8.1L

•	Engine Controls Connector End Views in Engine Controls - 6.6L (LB7)

•	Engine Controls Connector End Views in Engine Controls - 7.8L

Horn Relay

On the right side of the I/P under the access cover in the relay block

Horn Switch

In the steering wheel

Horn Component Views in Horns

Horn Connector End Views in Horns

Horn

Behind the front bumper on the front right side of the cross member

Horn Component Views in Horns

Horn Connector End Views in Horns

HVAC Control Assembly

Center of the I/P, left of the I/P switchbank

HVAC Component Views in HVAC Systems - Manual

HVAC Connector End Views in HVAC Systems - Manual

Hydromax® Fuse (JE3)

In the engine compartment left side under the brake master cylinder taped to the harness

Hydraulic Brake Component Views in Hydraulic Brakes

Hydraulic Brake Connector End Views in Hydraulic Brakes

Hydromax® Relay (JE3)

Left rear of the engine compartment behind the power steering fluid reservoir

Hydraulic Brake Component Views in Hydraulic Brakes

Hydraulic Brake Connector End Views in Hydraulic Brakes

Identification (ID) Lamp - Center

On top of the roof, on the forward center of the cab

Lighting Systems Component Views in Lighting Systems

Lighting Systems Connector End Views in Lighting Systems

Identification (ID) Lamp - Left

On top of the roof, on the forward left side of the cab, the inboard lamp

Lighting Systems Component Views in Lighting Systems

Lighting Systems Connector End Views in Lighting Systems

Identification (ID) Lamp - Right

On top of the roof, on the forward right side of the cab, the inboard lamp

Lighting Systems Component Views in Lighting Systems

Lighting Systems Connector End Views in Lighting Systems

I/P Gage Center-C1

Center top of the I/P behind the gage center

Instrument Panel, Gages, and Console Component Views in Instrument Panel, Gages, and Console

Instrument Panel, Gages, and Console Connector End Views in Instrument Panel, Gages, and Console

I/P Gage Center-C2

Center top of the I/P behind the gage center

Instrument Panel, Gages, and Console Component Views in Instrument Panel, Gages, and Console

Instrument Panel, Gages, and Console Connector End Views in Instrument Panel, Gages, and Console

Ignition Relay-Air Heater

In the I/P fuse block

Engine Controls Component Views in Engine Controls - 7.8L

Engine Controls Connector End Views in Engine Controls - 7.8L

Ignition Key Alarm Switch

In the steering column

Lighting Systems Component Views in Lighting Systems

Lighting Systems Connector End Views in Lighting Systems

Ignition Switch

On the top side of the steering column

Inflatable Restraint Front End Discriminating Sensor (AJ3/AK5)

Behind the front bumper, on the front center of the first crossmember

Inflatable Restraint I/P Module (AK5)

Front right side of the I/P

Inflatable Restraint I/P Module Disable Switch (AK5 w/o AQR)

Center of the I/P, below the gage center, in the I/P switchbank

Inflatable Restraint Resistor Module (AJ3)

Behind the left kick panel

Inflatable Restraint Sensing and Diagnostic Module (SDM) (AJ3/AK5)

Under the driver seat

Inflatable Restraint SIR Coil (AJ3/AK5)

Center of the upper steering column, behind the steering wheel

Inflatable Restraint Steering Wheel Module (AJ3/AK5)

Center of the upper steering column, on the front of the steering wheel

Instrument Panel Cluster (IPC)

In the left side of the I/P

Instrument Panel, Gages, and Console Component Views in Instrument Panel, Gages, and Console

Instrument Panel, Gages, and Console Connector End Views in Instrument Panel, Gages, and Console

Inter-Axle Differential Lock Switch (Tandem Axle)

On the left side of the interior bulkhead, behind the I/P, on the air brake supply manifold

Rear Axle Component Views in Drive Axle - Locking/Limited Slip

Rear Axle Connector End Views in Drive Axle - Locking/Limited Slip

Inter-Axle Differential Lock Switch Lamp (Tandem Axle)

Behind the center of the I/P, below the gage center, in the I/P switchbank, part of the pneumatic switch

Lighting Systems Component Views in Lighting Systems

Lighting Systems Connector End Views in Lighting Systems

Knock Sensor (KS) Bank 1 (L18)

In the engine block at the left side below the exhaust manifold

Engine Controls Component Views in Engine Controls - 8.1L

Engine Controls Connector End Views in Engine Controls - 8.1L

Knock Sensor (KS) Bank 2 (L18)

In the engine block at the right side below the exhaust manifold

Engine Controls Component Views in Engine Controls - 8.1L

Engine Controls Connector End Views in Engine Controls - 8.1L

Low Air Alarm Switch

Mounted to the right frame rail above the right fuel tank

Instrument Panel, Gages, and Console Component Views in Instrument Panel, Gages, and Console

Instrument Panel, Gages, and Console Connector End Views in Instrument Panel, Gages, and Console

Manifold Absolute Pressure (MAP) Sensor

In the front center of the intake manifold behind the water outlet

Engine Controls Component Views in Engine Controls - 8.1L

Engine Controls Connector End Views in Engine Controls - 8.1L

Manifold Air Temperature (MAT) Sensor

Top left rear of the engine mounted to the rear of the manifold

Engine Controls Component Views in Engine Controls - 8.1L

Engine Controls Connector End Views in Engine Controls - 8.1L

Marker Lamp Relay

In the I/P fuse block

Lighting Systems Component Views in Lighting Systems

Lighting Systems Connector End Views in Lighting Systems

Marker Lamp Roof 1

On top of the roof, on the forward left outboard side of the cab

Lighting Systems Component Views in Lighting Systems

Lighting Systems Connector End Views in Lighting Systems

Marker Lamp Roof 2

On top of the roof, on the forward left side of the cab, the inboard lamp

Lighting Systems Component Views in Lighting Systems

Lighting Systems Connector End Views in Lighting Systems

Marker Lamp Roof 3

On top of the roof, on the forward center of the cab

Lighting Systems Component Views in Lighting Systems

Lighting Systems Connector End Views in Lighting Systems

Marker Lamp Roof 4

On top of the roof, on the forward right side of the cab, the inboard lamp

Lighting Systems Component Views in Lighting Systems

Lighting Systems Connector End Views in Lighting Systems

Marker Lamp Roof 5

On top of the roof, on the forward left outboard side of the cab

Lighting Systems Component Views in Lighting Systems

Lighting Systems Connector End Views in Lighting Systems

Marker Lamps Switch

Center of the I/P, below the gage center, in the I/P switchbank

Lighting Systems Component Views in Lighting Systems

Lighting Systems Connector End Views in Lighting Systems

Mass Air Flow (MAF) Sensor

In the engine compartment on the right side of the air cleaner

•	Engine Controls Component Views in Engine Controls - 6.6L (LB7)

•	Engine Controls Component Views in Engine Controls - 8.1L

•	Engine Controls Connector End Views in Engine Controls - 6.6L (LB7)

•	Engine Controls Connector End Views in Engine Controls - 8.1L

Neutral Start Relay

In the underhood fuse block

Outside Heated Mirror Switch

Mounted in the center of the I/P

Outside Rearview Heated Mirror Relay

Fuse block I/P

Outside Rearview Mirror-Driver

Outside of the left door

Outside Rearview Mirror Switch (DB6)

On the driver door

Overdrive Defeat Switch (Allison® LCT)

Center of the I/P, below the HVAC air outlet, left of the radio and the HVAC control assembly

Automatic Transmission Electronic Component Views Automatic Transmission-Allison

Automatic Transmission Related Connector End Views in Automatic Transmission-Allison

Park Brake Switch (JE3) (C4/C5)

On the left kick panel to the right rear of the park brake lever

Hydraulic Brake Component Views in Hydraulic Brakes

Hydraulic Brake Connector End Views in Hydraulic Brakes

Park Brake Switch (JE3) (C6/C7/C8)

On the park brake lever under the center console

Hydraulic Brake Component Views in Hydraulic Brakes

Hydraulic Brake Connector End Views in Hydraulic Brakes

Park Brake Switch (JE4)

On the left side of the exterior bulkhead, on the air brake application valve

Air Brake System Component Views in Air Brakes

Air Brake System Connector End Views in Air Brakes

Park/Neutral Position (PNP) Switch (Allison® LCT)

Mounted on the left rear of the transmission

Automatic Transmission Electronic Component Views Automatic Transmission-Allison

Automatic Transmission Related Connector End Views in Automatic Transmission-Allison

Park/Turn Signal Lamp-LF

On the left front of the vehicle

Lighting Systems Component Views in Lighting Systems

Lighting Systems Connector End Views in Lighting Systems

Park/Turn Signal Lamp-RF

On the right front of the vehicle

Lighting Systems Component Views in Lighting Systems

Lighting Systems Connector End Views in Lighting Systems

Positive Crankcase Ventilation (PCV) Relay

In the underhood fuse block

Engine Controls Component Views in Engine Controls - 7.8L

Engine Controls Connector End Views in Engine Controls - 7.8L

Power Take-Off (PTO) Switch

Center of the I/P, below the gage center, in the I/P switchbank

Powertrain Control Module (PCM)

In the engine compartment on the left side of the bulkhead

Engine Controls Component Views in Engine Controls - 8.1L

Powertrain Control Module Connector End Views in Engine Controls - 8.1L

Pressure Control Valve 1

Top rear of the engine

Engine Controls Component Views in Engine Controls - 7.8L

Engine Controls Connector End Views in Engine Controls - 7.8L

Pressure Control Valve 2

Top rear of the engine

Engine Controls Component Views in Engine Controls - 7.8L

Engine Controls Connector End Views in Engine Controls - 7.8L

Radio (w/o UL5)

Center of the I/P, left of the gage center and I/P switchbank

Entertainment Component Views in Entertainment

Entertainment Connector End Views in Entertainment

Rear Axle Driver Control Switch - Two Speed (HPZ/Automatic Transmission)

Center of the I/P, below the gage center, in the I/P switchbank

Rear Axle Component Views in Rear Axle Controls

Rear Axle Connector End Views in Rear Axle Controls

Rear Axle Driver Control Switch - Two Speed (HPZ/Manual Transmission)

Mounted on the manual transmission shift lever

Rear Axle Component Views in Rear Axle Controls

Rear Axle Connector End Views in Rear Axle Controls

Rear Axle Driver Control Switch Lamp - Two Speed (HR1/Automatic Transmission)

Behind the center of the I/P, below the gage center, in the I/P switchbank, part of the pneumatic switch

Rear Axle Component Views in Rear Axle Controls

Rear Axle Connector End Views in Rear Axle Controls

Rear Axle Shift Motor - Two Speed (HPZ)

On the front of the rear axle, on the differential

Rear Axle Component Views in Rear Axle Controls

Rear Axle Connector End Views in Rear Axle Controls

Rear Axle Shift Relay - Two Speed (HPZ)

On the front side of the crossmember forward of the rear axle

Rear Axle Component Views in Rear Axle Controls

Rear Axle Connector End Views in Rear Axle Controls

Rear Axle Shift Switch - Two Speed (HR1/HR2)

On the frame rail forward of the rear axle

Rear Axle Component Views in Rear Axle Controls

Rear Axle Connector End Views in Rear Axle Controls

Rear Window Defogger Grid (C49)

On the rear window

Stationary Windows Component Views in Stationary Windows

Stationary Windows Connector End Views in Stationary Windows

Remote Control Door Lock Receiver (RCDLR) (AU0)

Under the left side of the I/P above the accelerator pedal

Keyless Entry Component Views in Keyless Entry

Keyless Entry Connector End Views in Keyless Entry

Resistor Module

In the right rear of the engine compartment in the HVAC module in back of the fuse block - underhood

HVAC Component Views in HVAC Systems - Manual

HVAC Connector End Views in HVAC Systems - Manual

Reverse Relay

Fuse block I/P

Serial Data Gateway (SDG) Module (Allison® MD)

Above the accelerator pedal on top of the I/P support bracket

Data Link Communications Component Views in Data Link Communications

Data Link Communications Connector End Views in Data Link Communications

Speaker - LF (w/o UL5)

In the left front door

Entertainment Component Views in Entertainment

Entertainment Connector End Views in Entertainment

Speaker - LF Tweeter (ZQ2)

In the left front door

Entertainment Component Views in Entertainment

Entertainment Connector End Views in Entertainment

Speaker - LR

In the left rear door

Entertainment Component Views in Entertainment

Entertainment Connector End Views in Entertainment

Speaker - RF (w/o UL5)

In the right front door

Entertainment Component Views in Entertainment

Entertainment Connector End Views in Entertainment

Speaker - RF Tweeter (ZQ2)

In the right front door

Entertainment Component Views in Entertainment

Entertainment Connector End Views in Entertainment

Speaker - RR

In the right rear door

Entertainment Component Views in Entertainment

Entertainment Connector End Views in Entertainment

Starter

On the lower right side of the engine

Engine Electrical Component Views in Engine Electrical

Starter Solenoid

On the lower right side of the engine, part of the starter

Engine Electrical Component Views in Engine Electrical

Starter Relay

In the engine compartment

Engine Electrical Component Views in Engine Electrical

Engine Electrical Connector End Views in Engine Electrical

Starter Temperature Switch (KQR)

On the lower right side of the engine, part of the starter

Engine Electrical Component Views in Engine Electrical

Engine Electrical Connector End Views in Engine Electrical

Stop Lamp Switch

Below the left side of the I/P on the brake pedal

Hydraulic Brake Component Views in Hydraulic Brakes

Hydraulic Brake Connector End Views in Hydraulic Brakes

Tail Lamps-Left

On the left rear of the vehicle

Lighting Systems Component Views in Lighting Systems

Lighting Systems Connector End Views in Lighting Systems

Tail Lamps-Right

On the right rear of the vehicle

Lighting Systems Component Views in Lighting Systems

Lighting Systems Connector End Views in Lighting Systems

Throttle Actuator Control (TAC) Module (L18)

Top center of the engine

Engine Controls Component Views in Engine Controls - 8.1L

Engine Controls Connector End Views in Engine Controls - 8.1L

Throttle Body (L18)

Top front of the engine

Engine Controls Component Views in Engine Controls - 8.1L

Engine Controls Connector End Views in Engine Controls - 8.1L

Traction Control Switch (NW9)

Center of the I/P, below the gage center, in the I/P switchbank

Air Antilock Brake System Component Views in Air Antilock Brake System

Air Brake System Connector End Views in Air Antilock Brake System

Traction Control Valve (JE4 and NW9)

On the right side of the crossmember forward of the rear axle

Air Antilock Brake System Component Views in Air Antilock Brake System

Air Brake System Connector End Views in Air Antilock Brake System

Tractor/Trailer Connector (RQ2 and U86 or RQ3)

On the left side of the rear crossmember

Lighting Systems Component Views in Lighting Systems

Lighting Systems Connector End Views in Lighting Systems

Trailer Relay

In the I/P fuse block

Lighting Systems Component Views in Lighting Systems

Lighting Systems Connector End Views in Lighting Systems

Trailer Stop Lamp Switch (JE4 and RQ2 and U86 or JE4 and RQ3)

Below the left side of the I/P on the brake pedal

Lighting Systems Component Views in Lighting Systems

Lighting Systems Connector End Views in Lighting Systems

Transmission Control Module (TCM) (Allison® LCT or MD)

On the outside of the exterior bulkhead mounted on a bracket

Automatic Transmission Electronic Component Views in Automatic Transmission-Allison

Automatic Transmission Related Connector End Views in Automatic Transmission-Allison

Turbine Shaft Speed (TSS) Sensor (Allison® LCT)

On the upper left side of the transmission, behind the transmission bell housing

Automatic Transmission Electronic Component Views in Automatic Transmission-Allison

Automatic Transmission Related Connector End Views in Automatic Transmission-Allison

Turbocharge Boost Pressure Sensor

Top rear of the engine

Engine Controls Component Views in Engine Controls - 7.8 L

Engine Controls Connector End Views in Engine Controls - 7.8L

Turn Signal/Hazard Flasher Module

Left lower side of the I/P to the right of the lower steering column

Lighting Systems Component Views in Lighting Systems

Lighting Systems Connector End Views in Lighting Systems

Turn Signal/Multifunction Switch

Center of the upper steering column, behind the steering wheel

Lighting Systems Component Views in Lighting Systems

Vacuum Pump

In the engine compartment mounted to the front right of the radiator support

HVAC Component Views in HVAC Systems - Manual

HVAC Connector End Views in HVAC Systems - Manual

Vehicle Speed Sensor (VSS) (Automatic Transmission)

On the automatic transmission on the top left rear

Automatic Transmission Electronic Component Views in Automatic Transmission-Allison

Automatic Transmission Related Connector End Views in Automatic Transmission-Allison

Vehicle Speed Sensor (VSS) (Manual Transmission)

On the transmission on the top left rear

•	Engine Controls Component Views in Engine Controls - 7.2L (Caterpillar)

•	Engine Controls Component Views in Engine Controls - 7.8L

•	Engine Controls Connector End Views in Engine Controls - 7.2L (Caterpillar)

•	Engine Controls Connector End Views in Engine Controls - 7.8L

Water-in-Fuel Sensor

Inside the fuel tank

•	Engine Controls Component Views in Engine Controls - 7.2L (Caterpillar)

•	Engine Controls Component Views in Engine Controls - 7.8L

•	Engine Controls Connector End Views in Engine Controls - 7.2L (Caterpillar)

•	Engine Controls Connector End Views in Engine Controls - 7.8L

Wheel Speed Sensor (WSS) - LF (JE4)

Mounted in the left front brake backing plate

Air Antilock Brake System Component Views in Air Antilock Brake System

Air Antilock Brake System Connector End Views in Air Antilock Brake System

Wheel Speed Sensor (WSS) - LR Middle (Tandem Axle/JE4)

Mounted in the left middle backing plate

Air Antilock Brake System Component Views in Air Antilock Brake System

Air Antilock Brake System Connector End Views in Air Antilock Brake System

Wheel Speed Sensor (WSS) - LR (JE4)

Mounted in the left rear brake backing plate

Air Antilock Brake System Component Views in Air Antilock Brake System

Air Antilock Brake System Connector End Views in Air Antilock Brake System

Wheel Speed Sensor (WSS) - RF (JE4)

Mounted in the right front brake backing plate

Air Antilock Brake System Component Views in Air Antilock Brake System

Air Antilock Brake System Connector End Views in Air Antilock Brake System

Wheel Speed Sensor (WSS) - RR Middle (Tandem Axle/JE4)

Mounted in the right middle backing plate

Air Antilock Brake System Component Views in Air Antilock Brake System

Air Antilock Brake System Connector End Views in Air Antilock Brake System

Wheel Speed Sensor (WSS) - RR (JE4)

Mounted in the right rear brake backing plate

Air Antilock Brake System Component Views in Air Antilock Brake System

Air Antilock Brake System Connector End Views in Air Antilock Brake System

Wheel Speed Sensor (WSS) - LF (JE3)

Mounted in the left front wheel steering knuckle

Hydraulic Brake Component Views in Hydraulic Brakes

Hydraulic Brake Connector End Views in Hydraulic Brakes

Wheel Speed Sensor (WSS) - RF (JE3)

Mounted in the right front wheel steering knuckle

Hydraulic Brake Component Views in Hydraulic Brakes

Hydraulic Brake Connector End Views in Hydraulic Brakes

Wheel Speed Sensor (WSS) - RR (JE3)

Mounted in the right rear brake backing plate

Hydraulic Brake Component Views in Hydraulic Brakes

Hydraulic Brake Connector End Views in Hydraulic Brakes

Wheel Speed Sensor (WSS) - RR (JE4)

Mounted in the right rear brake backing plate

Air Antilock Brake System Component Views in Air Antilock Brake System

Air Antilock Brake System Connector End Views in Air Antilock Brake System

Wheel Speed Sensor (WSS) - LR (JE3)

On the left rear wheel

Hydraulic Brake Component Views in Hydraulic Brakes

Hydraulic Brake Connector End Views in Hydraulic Brakes

Window Motor - LR (A31/Crew Cab)

In the left rear door

Window Motor - Driver (A31)

In the driver door

Window Motor - Passenger (A31)

In the passenger door

Window Motor - RR (A31/Crew Cab)

In the right rear door

Window Switch - Driver (A31)

On the left front door trim panel armrest

Window Switch - LR (A31/Crew Cab)

On the left rear door trim panel

Window Switch - Passenger (A31)

On the passenger door trim panel

Window Switch - RR (A31/Crew Cab)

On the right rear door trim panel

Windshield Washer Fluid Pump

In the left rear engine compartment mounted on the washer fluid container

Wiper/Washer Component Views in Wipers/Washer Systems

Wiper/Washer Connector End Views in Wipers/Washer Systems

Windshield Washer Fluid Level Switch

In the left rear engine compartment mounted on the washer fluid container

Wiper/Washer Component Views in Wipers/Washer Systems

Wiper/Washer Connector End Views in Wipers/Washer Systems

Windshield Wiper Motor

In the engine compartment behind the cowl

Wiper/Washer Component Views in Wipers/Washer Systems

Wiper/Washer Connector End Views in Wipers/Washer Systems

Windshield Wiper Switch

Left side of the upper steering column, a ring on the multifunction lever, part of the turn signal/multifunction switch

C100 (30 cavities)

On the right frame rail, behind the shock absorber

C101 (30 cavities)

On the right frame rail, behind the shock absorber

C102 (8 cavities)

Top of the engine under the PCM connector

C104

On the right frame rail in front of the

C105

Engine harness to A/C harness

C106

Rear chassis harness to engine fan harness, in the engine compartment

C107

Rear chassis harness to engine fan harness, in the engine compartment

C108

Left forward lamp harness to rear chassis harness, in the engine compartment

C109

Back right of the engine under the ECM/PCM

C110 (8 cavities)

Top right of the engine on top of the manifold

C111

C112

C114

Engine harness to battery isolator harness

C115

Engine harness to starter temperature switch harness, in the engine compartment

C116

C117

C118

Back right of the engine under the ECM/PCM (LG4/L18) top of the engine (LB7)

C119

On the top front of the engine

C120

C121 (10 cavities)

On the right frame rail behind the radiator shroud

C122 (8 cavities - LG4)

Engine harness to the fuel injector harness connector adapter 1 to injector harness 1, on the upper left side of the cylinder head between injector 2 and 3

C123 (8 cavities - LG4)

Engine harness to the fuel injector harness connector adapter 2 to injector harness 2, on the upper left side of the cylinder head between injector 4 and 5

C123

Engine harness to starter temperature switch harness, in the engine compartment

C124 (24 cavities)

Right side of the engine compartment under the engine control module (ECM)/powertrain control module (PCM)/transmission control module (TCM)

C150 (4 cavities)

Behind the windshield washer reservoir in the engine compartment

C200

Back right of the engine under the ECM/PCM

C201

Underneath the steering column

C202 (30 cavities)

Behind the right kick panel

C203

I/P harness to body harness

C204

Body harness to cross body harness

C206

I/P harness to body harness

C207 (30 cavities)

Behind the right kick panel

C208

Cross body harness to stop lamp switch harness, behind the I/P

C209

I/P harness to body harness

C210

I/P harness to park brake switch harness

C211

I/P harness to body harness

C212

C213 (40 cavities)

On the right frame rail near the shock absorber

C214 (40 cavities)

Under right wheel well

C284

In the I/P harness

C300

Engine harness to M/T harness, in the engine compartment

C303

Rear chassis harness to rear ABS harness

C304

I/P harness to front trailer harness

C305 (12 cavities - Upfitter Lighting Connector)

Chassis harness to the upfitter supplied harness, taped to the chassis harness at the inboard right frame rail forward of splice pack SP400 (ground block)

C315

Behind the drivers seat

C400

Rear chassis harness to rear ABS harness

C401

Rear chassis harness to rear ABS harness

C402

C404

Rear chassis harness to brake booster pump harness

C405

Rear chassis harness to brake booster pump harness

C406

Rear ABS harness to rear axle harness

C408

Rear chassis harness to air compressor harness

C409

Rear chassis harness to fuel tank harness

C410

Front of the air compressor

C412

Behind the rear crossmember

C420

On the crossmember to the right of the primary fuel tank

C500

Behind the left kick panel

C501

Behind the left kick panel

C502

Cross body harness to driver door harness

C600

Cross body harness to front passenger door harness

C601

Front passenger door harness to outside rearview mirror harness

C700

Body harness to LR door harness

C800

Body harness to RR door harness

G100

In the engine compartment, near he front left of the engine

G101

In the engine compartment, in the lower left corner in front of the cowl

G102

In the engine compartment, in the lower right corner in front of the cowl

G103

Behind the right side kick panel

G105

Behind the left kick panel

G106

On the crossmember underneath the cab

G112

In the engine compartment

G113

In the engine compartment

G115

In the engine compartment

G118

In the engine compartment

G200

On the right frame rail near the front right side of the engine

G202

On the right frame rail near the middle right side of the engine

G203

On the right frame rail underneath the cab

G204

In the engine compartment

G205

In the engine compartment

G400

On the left fuel tank

S100

(CKT 1020) In the engine harness, approximately 8 cm (3.1 in) from TCM C2 breakout, toward the fuse block - underhood

S101

(CKT 440) In the engine harness, approximately 18.5 cm (7.3 in) from the breakout for C101, C200 toward the ECM

S102

(CKT 439) In the engine harness, approximately 13.5 cm (5.3 in) from the breakout for C101, C200 toward the ECM

S103

(CKT 239) In the engine harness, approximately 23.5 cm (9.3 in) from the breakout for C101, C200 toward the ECM

S104

In the engine harness, 7 cm (3 in) into the branch to the generator connector C2

S105

(CKT 1042) In the engine harness, approximately 5.5 cm (2.2 in) from the breakout for the fuse block-underhood

S106

(CKT 539) In the engine harness, approximately 20.5 cm (8 in ) from the breakout for C118, 119 toward the fuse block-underhood

S107

(CKT 339) In the engine harness, 4 cm (2 in) from the breakout for C123, toward the breakout for the MAP sensor and EGR valve

S109

In the engine harness approximately 7.62 cm (2 in) from the fuel injector control module connector breakout (LB7)

S114

(CKT 250) In the engine harness, approximately 7 cm (2.75 in) from the breakout for C121 toward the fuse block-underhood

S115

In the engine harness, at the starter solenoid B+ terminal

S116

In the engine side of the I/P harness, 10 cm (4 in) from the windshield wiper motor breakout

S117

In the forward lamp harness, 5 cm (2 in) forward of the TCM breakout

S118

(CKT 351) In the engine harness, approximately 2.5 cm (1 in) from transmission optional connector toward the fuse block-underhood

S120

(CKT 488) In the engine harness, approximately 7 cm (2.75 in) from the breakout for C121 toward the fuse block-underhood

S121

(CKT 2522) In the engine harness, approximately 8.5 cm (3.3 in) from the breakout for C101, C200 toward the ECM

S122

In the engine harness, 15 cm (6 in) from C109

S123

In the engine harness, 12 cm (5 in) from the powertrain control module

S124

In the engine harness, 27 cm (11 in) from C110

S125

In the L18 engine harness, 33 cm (13 in) from the powertrain control module

S126

In the engine harness, 6 cm (2 in) from the power brake booster pump motor breakout toward the ABS relay center

S127

In the engine harness branch for TCM connector C1, 7 cm (3 in) from the breakout for the TCM connector C1

S128

In the engine harness branch to the EBCM, 10 cm (4 in) from the breakout for G412

S130

In the engine harness, at the starter solenoid B+ terminal, fusible link M

S131

In the engine harness, 10 cm (4 in) from the windshield wiper motor breakout toward the ABS relay center

S132

In the engine harness, 5 cm (2 in) forward of the TCM breakout

S133

In the engine harness, 4 cm (2 in) from the EGR valve

S134

In the engine harness, 8 cm (3 in) from the EGR valve breakout in the branch

S135

In the engine harness, 15 cm (6 in) from C109

S136

In the engine harness, 12 cm (5 in) from the breakout for C121, toward the powertrain control module

S137

In the engine harness, 8 cm (3 in) from the EGR valve breakout in the branch

S138

In the engine harness, 12 cm (5 in) from the EGR valve

S139

In the engine harness, 15 cm (6 in) from C109

S140

In the engine harness, 12 cm (5 in) from the breakout for C121

S141

In the engine harness, 15 cm (6 in) from C109

S142

In the engine harness, 12 cm (5 in) from the breakout for C121, toward the powertrain control module

S143

In the forward lamp harness, 45 cm (18 in) from C412

S145

In the engine harness, 27 cm (11 in) from C110

S146

(CKT 762) In the engine harness, approximately 4.5 cm (1.7 in) from the breakout for C101, C200 toward the ECM

S147

In the A/C harness, 33 cm (13 in) from the breakout for C121

S148

In the A/C harness, 6 cm (2 in) from the power brake booster pump motor breakout toward the ABS relay center

S150

In the engine harness, 2 cm (1 in) from connector C105 to the park brake harness

S151

(CKT 2361) In the engine harness, approximately 10 cm (3.9 in) from the breakout for C102 toward the fuse block-underhood

S152

(CKT 2362) In the engine harness, approximately 11 cm (4.3 in) from the breakout for C102 toward the fuse block-underhood

S153

In the engine harness, 20 cm (8 in) from the ignition coil-8 connector

S154

In the engine harness, 10 cm (4 in) from the breakout for C123

S155

(CKT 2362) In the I/P harness, approximately 12 cm (4.75 in) from the breakout for the ECM toward the fuse block-I/P

S156

In the engine harness, 10 cm (4 in) from the PCM breakout, toward the engine oil pressure switch breakout

S157

In the I/P harness, 20 cm (8 in) (L18), or 38 cm (15 in) (LG5) from the A/C compressor clutch relay connector

S158

In the I/P harness, 18 cm (7 in) from the branch for the transmission control module (TCM)

S160

In the I/P harness, 4 cm (2 in) from the breakout for C121, toward the PCM connectors

S160

In the I/P harness, 8 cm (3 in) away from the exterior upfitter AUX WRG connector breakout

S161

In the I/P harness, 36 cm (14 in) from C109

S162

In the I/P harness, at the generator C1 terminal

S163

(CKT 24) In the engine harness, approximately 38.5 cm (15.2 in) from the breakout for C121 toward the fuse block-underhood

S200

(CKT 141) In the I/P harness, approximately 16.5 cm (6.5 in) from the breakout for the ECM toward the fuse block-I/P

S201

In the I/P harness, 8 cm (3 in) from the turn signal/hazard flasher module breakout

S202

(CKT 1142) In the I/P harness, approximately 21.5 cm (8.5 in) from the breakout for the ECM toward the fuse block-I/P

S203

(CKT 142) In the I/P harness, approximately 12 cm (4.75 in) from the breakout for the I/P gage center toward the fuse block-I/P

S204

(CKT 242) In the I/P harness, approximately 6.5 cm (2.5 in) from the breakout for C201 between the breakout and C201

S205

(CKT 1140) In the I/P harness, approximately 7.5 cm (7 in) from the breakout for the I/P gage center toward the fuse block-I/P

S206

(CKT 2609) In the I/P harness, approximately 32 cm (12.5 in) from the breakout for the air temperature actuator

S207

(CKT 618) In the I/P harness, approximately 16 cm (6.3 in) from the breakout for the air temperature actuator

S208

(CKT 2509) In the right door harness, approximately 5 cm (2 in) from the breakout for the window motor-passenger between the breakout and the connector

S209

In the I/P harness, 4 cm (2 in) from the data link connector breakout toward C200

S210

(CKT 641) In the I/P harness, approximately 5.5 cm (2 in) from the breakout for HVAC control assembly toward the fuse block-I/P

S211

(CKT 39) In the I/P harness, approximately 4 cm (1.5 in) from the breakout for HVAC control assembly toward the fuse block-I/P

S212

(CKT 441) In the I/P harness, approximately 11.5 cm (4.5 in) from the breakout for the ECM toward the fuse block-I/P

S213

(CKT 139) In the I/P harness, approximately 6.5 cm (2.5 in) from the breakout for HVAC control assembly toward the fuse block-I/P

S214

(CKT 806) In the I/P harness, approximately 5 cm (2 in) from the breakout for the air temperature actuator toward the fuse block-I/P

S215

(CKT 8) In the I/P harness, approximately 6.5 cm (2.5 in) from the breakout for HVAC control assembly toward the fuse block-I/P

S216

(CKT 1020) In the I/P harness, approximately 2.5 cm (1 in) from the breakout for HVAC control assembly toward the fuse block-I/P

S217

(CKT 43) In the I/P harness, approximately 7.5 cm (3 in) from the breakout for IPC between the breakout and the IPC connector

S218

(CKT 540) In the I/P harness, approximately 6.5 cm (2.6 in) from the breakout for C207 between the breakout and C207

S219

(CKT 840) In the I/P harness, approximately 1.5 cm (0.5 in) from the breakout for HVAC control assembly toward the fuse block-I/P

S220

(CKT 439) In the I/P harness, approximately 4 cm (1.6 in) from the breakout for C202 toward the fuse block-I/P

S221

(CKT 1320) In the I/P harness, approximately 26.5 cm (10.5 in) from the breakout for the ECM toward the fuse block-I/P

S222

(CKT 541) In the I/P harness, approximately 6.5 cm (2.5 in) from the breakout for the I/P gage center toward the fuse block-I/P

S223

(CKT 239) In the I/P harness, approximately 31.5 cm (12.5 in) from the breakout for the ECM toward the fuse block-I/P

S227

In the body harness, 7 cm (3 in) from the breakout for connector C200 toward the driver door jamb switch breakout

S229

(CKT 440) In the I/P harness, approximately 40 cm (15.75 in) from the breakout for the ECM toward the fuse block-I/P

S230

(CKT 1696) In the I/P harness, approximately 10 cm (4 in) from the breakout for C201 between the breakout and C201

S232

(CKT 1451) In the I/P harness, approximately 38.5 cm (15.1 in) from the breakout for the air temperature actuator

S233

(CKT 1451) In the I/P harness, approximately 9 cm (3.5 in) from the breakout for the ECM toward the fuse block-I/P

S234

In the I/P harness 12 cm (5 in) from pass through P100 toward C200

S235

In the I/P extension harness 7 cm (3 in) from the turn signal/multifunction switch C1 breakout toward the headlamp dimmer switch breakout

S236

In the I/P extension harness, 4 cm (2 in) from the turn signal/hazard flasher module breakout toward P100

S237

In the I/P extension harness, 6 cm (2 in) from the turn signal/hazard flasher module breakout

S238

In the I/P harness, 4 cm (2 in) from the park brake control module/C205 breakout

S239

In the I/P harness, 7 cm (3 in) from the breakout for the stop lamp switch interface module toward the convenience center

S240

(CKT 750) In the I/P harness, approximately 2.5 cm (1 in) from the breakout for the headlamp switch toward the fuse block-I/P

S241

In the cross body harness, 18 cm (7 in) from the IPC connector breakout toward the convenience center

S242

In the rear chassis harness, 7 cm (3 in) into the outside heated mirror switch breakout

S243

(CKT 450) In the I/P harness, approximately 6.5 cm (2.5 in) from the breakout for C202 toward the fuse block-I/P

S244

(CKT 450) In the I/P harness, approximately 12 cm (4.7 in) from the breakout for the air temperature actuator

S245

(CKT 450) In the I/P harness, approximately 9 cm (3.5 in) from the breakout for C202 toward the fuse block-I/P

S246

In the I/P extension harness, 14 cm (6 in) from the breakout for the mode actuator toward the breakout for the air temperature actuator

S247

In the I/P harness, 8 cm (3 in) from the breakout for the IPC, toward the breakout for the convenience center

S248

(CKT 553) In the I/P harness, approximately 4 cm (1.6 in) from the breakout for serial data gateway toward the fuse block-I/P

S249

(CKT 1382) In the I/P harness, approximately 6 cm (2.5 in) from the breakout for C201 toward the cowl

S250

In the I/P harness, diode splice, 5 cm (2 in) from the breakout for the IPC, toward the breakout for the convenience center

S251

In the I/P extension harness, 14 cm (6 in) from the breakout for the mode actuator toward the breakout for the air temperature actuator

S252

(CKT 15) In the I/P harness, approximately 5 cm (2 in) from the breakout for DLC toward the fuse block-I/P

S253

(CKT 14) In the I/P harness, approximately 7.5 cm (3 in) from the breakout for the DLC toward the fuse block-I/P

S254

(CKT 343) In the cross body harness, 17 cm (7 in) from the breakout for G412

S255

(CKT 640) In the I/P harness, approximately 4 cm (1.6 in) from the breakout for C202 toward the fuse block-I/P

S256

In the I/P harness, 8 cm (3 in) from the upfitter accessory feed connector breakout, toward the IPC connector breakout

S257

(CKT 319) In the I/P harness, approximately 6.5 cm (2.5 in) from the breakout for C201 toward the fuse block-I/P

S258

In the I/P extension harness, 4 cm (2 in) from the breakout for the convenience center toward the breakout for C210

S259

(CKT 21) In the I/P harness, approximately 2.5 cm (1 in) from the breakout for chime module toward the fuse block-I/P

S260

(CKT 28) In the I/P harness, approximately 52 cm (20 in) from C207

S261

(CKT 9) In the I/P harness, approximately 5 cm (2 in) from the breakout for C201 toward the cowl

S262

(CKT 17) In the I/P harness, approximately 20 cm (7.9 in) from the breakout for the air temperature actuator

S263

In the I/P harness, 6 cm (2 in) into the multifunction alarm module breakout from the main harness

S264

(CKT 592) In the I/P harness, approximately 21 cm (8.25 in) from the breakout for IPC toward the fuse block-I/P

S265

(CKT 11) In the I/P harness, approximately 20 cm (8 in) from the breakout for the I/P gage center toward the fuse block-I/P

S267

In the cross body harness, 4 cm (2 in) from the turn signal/multifunction switch C1 breakout toward the turn signal/hazard flasher module breakout

S268

(CKT 140) In the I/P harness, approximately 28 cm (11 in) from the breakout for the air temperature actuator

S269

(CKT 420) In the I/P harness, approximately 11 cm (4.3 in) from the breakout for C207 between the breakout and C207

S270

(CKT 1134) In the I/P harness, approximately 29.5 cm (11.5 in) from the breakout for C203 toward the fuse block-I/P

S271

In the I/P harness, 15 cm (6 in) from the data link connector breakout toward C200

S273

(CKT 1922) In the I/P harness, approximately 15 cm (6 in) from the breakout for the air temperature actuator toward the fuse block-I/P

S274

(CKT 1921) In the I/P harness, approximately 10 cm (4 in) from the breakout for the air temperature actuator toward the fuse block-I/P

S275

(CKT 2362) In the engine harness, approximately 4 cm (1.6 in) from the C121 breakout toward the ECM

S276

(CKT 2361) In the engine harness, approximately 3 cm (1.2 in) from the C121 breakout toward the ECM

S277

In the I/P harness, 6 cm (2 in) from the turn signal/hazard flasher module

S278

In the I/P harness, 4 cm (2 in) from the park brake control module/C205 breakout

S279

(CKT 2362) In the I/P harness, approximately 16.5 cm (6.5 in) from the breakout for the I/P gage center toward the fuse block-I/P

S280

(CKT 2361) In the I/P harness, approximately 17.5 cm (7 in) from the breakout for the I/P gage center toward the fuse block-I/P

S281

In the I/P harness, 11 cm (4 in) from the breakout for the stop lamp switch interface module, toward the convenience center

S283

In the I/P harness, 5 cm (2 in) from the breakout for C205 to the dome lamp/rear speakers

S284

(CKT 488) In the I/P harness, approximately 24 cm (9.5 in) from the breakout for the air temperature actuator

S286

(CKT 84) In the I/P harness, approximately 10 cm (4 in) from the breakout for the air temperature actuator toward the fuse block-I/P

S300

In the cross body harness , 5 cm (2 in) to the rear of the ground block breakout

S301

In the body harness, 10 cm (4 in) to the rear of the ground block breakout

S302

In the body harness, 8 cm (3 in) from the breakout for C123 toward the MAP sensor and EGR valve (L18), or 19 cm (7 in)

S303

In the exhaust brake harness, 11 cm (4 in) from the powertrain control module connector

S304

In the cross body harness, 5 cm (2 in) to the rear of the ground block breakout

S305

In the cross body harness, 10 cm (4 in) to the rear of the ground block breakout

S307

In the cross body harness, 10 cm (4 in) from the left fuel pump and sender assembly breakout

S308

In the harness, 10 cm (4 in) from the breakout for C412 toward the heated moisture ejector valve

S309

In the cross body harness, 30 cm (12 in) from the breakout for C412 toward the heated moisture ejector valve

S310

In the body harness, 11 cm (4 in) from the powertrain control module connector

S312

In the body harness, 11 cm (4 in) from the powertrain control module connector

S313

In the backup lamp harness, 30 cm (12 in) from the breakout for C412 toward the heated moisture ejector valve

S314

In the backup lamp harness, 11 cm (4 in) from the powertrain control module connector

S315

In the rear chassis harness, resistor splice, 11 cm (4 in) from the powertrain control module connector

S316

In the rear chassis harness, 5 cm (2 in) from the left fuel pump and sender assembly breakout

S317

In the cross body harness, 11 cm (4 in) from the transmission control module connector

S318

In the engine harness, 5 cm (2 in) forward of the breakout for the two speed rear axle shift relay

S319

(CKT 24) In the rear chassis harness, approximately 6.5 cm (2.5 in) from the breakout for the ground block toward the EBCM

S320

(CKT 11) In the rear chassis harness, approximately 10.5 cm (4 in) from the breakout for C108 toward the EBCM

S321

(CKT 12) In the rear chassis harness, approximately 6.5 cm (2.5 in) from the breakout for C108 toward the EBCM

S322

In the cross body harness, 3 cm (1 in) from the driver window switch

S323

In the body harness, 3 cm (1 in) from the right door lock actuator

S324

In the crew cab body harness, approximately 13 cm (5 in) from the breakout for C203 toward the inflatable restraint sensing and diagnostic module (SDM)

S325

In the body harness, 35 cm (14 in) or 40 cm (16 in) from the A/T shift lever connector

S326

(CKT 2509) In the body harness, approximately 5 cm (2 in) from the breakout for the window switch-driver toward the switch

S327

In the rear chassis harness, 22 cm (9 in) from the IPC breakout toward the data link connector breakout

S328

In the rear chassis harness, 4 cm (2 in) from the breakout for the I/P connector C202 toward the right door lock switch connector C218

S329

In the cross body harness, 44 cm (17 in) from the radio connector breakout toward the I/P fuse block breakout

S330

In the body harness, 16 cm (6 in) or 30 cm (12 in) from the A/T shift lever connector

S331

In the engine harness, 40 cm (16 in) from P100 toward the bank 1 HO2S (L18), or 60 cm (24 in) from the fuel heater breakout toward the engine oil pressure gage sensor breakout

S332

(CKT 2361) In the I/P harness, approximately 4 cm (1.5 in) from the breakout for the ECM toward the fuse block-I/P

S333

In the engine harness, resistor splice, 11 cm (4 in) from the transmission control module connector

S334

In the I/P harness, 3 cm (1 in) from the window actuator motor breakout toward P500

S400

In the right power window harness, 3 cm (1 in) from the driver window switch

S401

In the rear chassis harness, 5 cm (2 in) from the right door lock actuator

S402

In the rear chassis and tail lamps harness, 5 cm (2 in) before the tail lamps breakout

S403

(CKT 151) In the rear chassis harness, approximately 4 cm (1.5 in) from the breakout for C117 the ground block

S404

In the rear chassis harness, 8 cm (3 in) from the breakout for fuel injector 5

S405

In the engine harness, 7 cm (3 in) from the breakout for fuel injector 6

S406

In the rear chassis harness, 4 cm (2 in) from the underhood fuse block breakout, toward the windshield wiper motor breakout

S407

In the fuel tank harness, 73 cm (29 in) from P100 toward the breakout for the powertrain control module

S408

In the fuel tank harness 16 cm (6 in) from the breakout for C123

S409

(CKT 642) In the rear chassis harness, approximately 6.5 cm (2.5 in) from the breakout for RR WSS toward the Trailer connector

S410

In the tail lamp harness, 7 cm (3 in) from the coolant level switch breakout, toward the engine coolant temperature switch

S411

In the tail lamp harness, 71 cm (28 in) from P100 toward the breakout for the powertrain control module

S412

(CKT 241) In the I/P harness, approximately 18 cm (7 in) from the breakout for the I/P gage center toward the fuse block-I/P

S413

In the engine harness, 8 cm (3 in) from the breakout for C123

S414

In the I/P harness, diode splice, 23 cm (9 in) from connector C210, toward the breakout for the convenience center

S415

In the fuel tank harness, 4 cm (2 in) from the breakout for the I/P connector C202 toward the left door lock switch connector

S421 (K16)

(CKT 350) In the air compressor harness

S500

(CKT 540) In the driver door harness, approximately 4.5 cm (1.75 in) from the breakout for the outside rearview mirror switch toward the switch

S501

(CKT 501) In the driver door harness, approximately 9 cm (4 in) from the park brake pressure sensor connector

S502 (AU3/A31)

(CKT 201) In the driver door harness, 3 cm (1 in) from the window actuator motor breakout toward P500

S503 (AU3/A31)

(CKT 118) In the driver door harness, approximately 30 cm (11.75 in) from the breakout for the tweeter connector toward the cross body harness

S504

(CKT 1499) In the driver door harness, approximately 4.5 cm (1.75 in) from the breakout for the OSRVM connector toward the OSRVM connector

S505

(CKT 343) In the driver door harness, approximately 4.5 cm (1.75 in) from the breakout for the OSRVM connector toward the cross body harness

S506

In the driver door harness, 3 cm (1 in) from the driver window switch

S600

(CKT 550) In the rear passenger door harness, approximately 6.5 cm (2.5 in) from the breakout for the rear window switch toward C700

S602 (AU3/A31)

(CKT 200) In the front passenger door harness, approximately 30 cm (12 in) from the breakout for the speaker-RF door toward C500

S603 (AU3/A31)

(CKT 117) In the front passenger door harness, approximately 20 cm (8 in) from the breakout for the speaker-RF door toward C500

S604

(CKT 1497) In the front passenger door harness, approximately 4.5 cm (1.75 in) from the breakout for the outside rearview mirror-passenger between the breakout and the connector

S605

In the right power door lock harness, 11 cm (1 in) from the right door lock actuator

S700

In the left rear door harness 11 cm (1 in) from the window switch

S900

(CKT 2509) In the rear chassis harness, approximately 10.5 cm (4 in) from the breakout for the ground block toward the EBCM

S901

(CKT 2509) In the I/P harness, approximately 4 cm (1.6 in) from the breakout for the air temperature actuator

Splice Pack Connector End Views

SP203 (12 cavities)

Left side of the I/P below the headlamp switch

Data Link Communications Component Views in Data Link Communications

Data Link Communications Connector End Views in Data Link Communications

SP400 (Ground Block) (6 cavities)

On the inboard side of the right frame rail behind the cab, part of the negative battery cable