Harness Routing Views. GMC Truck Sierra Classic

For 1990-2009 cars only

Makes 🢒 GMC_Truck 🢒 2007 🢒 Sierra Classic - 2WD 🢒 Transmission/Transaxle 🢒 Automatic Transmission - 4L60-E/4L65-E/4L70-E 🢒 Harness Routing Views

Figure 1:

Forward Lamp Harness Routing


(1)	Fuse Block - Underhood - Cooling Fan Connector
(2)	Fuse Block - Underhood Cooling Fan
(3)	C180
(4)	Fuse Block - Underhood C4
(5)	Battery Positive Voltage
(6)	C104
(7)	C125 (VYU)
(8)	S100
(9)	G100
(10)	C127(VYU)
(11)	S101
(12)	G115

Figure 2:

LR of the Engine Compartment (9L4)


(1)	Brake/Clutch Harness
(2)	C119
(3)	I/P Harness
(4)	Engine Harness
(5)	Fuse Block - Underhood
(6)	Negative Battery Cable Harness
(7)	C117
(8)	Accessory Jumper Harness
(9)	C160 (5XY/5Y0)

Figure 3:

LR of the Engine Compartment (5Y0)


(1)	Brake/Clutch Harness
(2)	Fuse Block - Underhood
(3)	Emergency Vehicle Roof Lamp Relay
(4)	C160
(5)	C119
(6)	C161
(7)	Chassis Harness

Figure 4:

Battery Cable, 3 - Phase Cable, and Power Steering Pump Harnesses (HP2)


(1)	3-Phase Cable
(2)	Power Steering Pump Harness
(3)	Auxiliary Battery Cable Jumpstart Lead
(4)	Dash Panel
(5)	Auxiliary Battery Cable Terminal to Fuse Block - Underhood
(6)	Battery Cable Terminal to Fuse Block - Underhood
(7)	Positive Battery Cable
(8)	Negative Battery Terminal
(9)	Power Steering Pump Connector C2
(10)	G100
(11)	G105
(12)	Starter/Generator Rotor
(13)	Starter/Generator Stator
(14)	Battery Cable Harness
(15)	C121
(16)	C122
(17)	Starter/Generator Control Module

Figure 5:

C100, C102 and C152


(1)	C102
(2)	Fuse Block - Underhood Support Mount
(3)	C152
(4)	C100

Figure 6:

C150, C151, C153, C154, and PTO Relay


(1)	Fuse Block - Underhood
(2)	C153 - Engine Harness to Transfer Case Harness
(3)	C150 - Transfer Case Harness to Axle Jumper Harness
(4)	Transfer Case Harness
(5)	C151 - I/P Harness to Automatic Transfer Case Harness (NP8/NP1)
(6)	C154 - I/P Harness to Automatic Transfer Case Harness (NP8/NP1)
(7)	Power Take-Off (PTO) Relay

Figure 7:

Engine Harness - 4.3L


(1)	Intake Air Temperature (IAT)/ Mass Air Flow (MAF) Sensor Connector
(2)	Generator Connector
(3)	Coolant Level Switch Connector
(4)	Manifold Absolute Pressure (MAP) Sensor Connector
(5)	A/C Low Pressure Switch Connector
(6)	Auxiliary Battery Relay Connector (TP2)
(7)	S102
(8)	S103
(9)	Heated Oxygen Sensor (HO2S) Bank 2 Sensor 1 Connector
(10)	Heated Oxygen Sensor (HO2S) Bank 2 Sensor 2 Connector
(11)	Heated Oxygen Sensor (HO2S) Bank 1 Sensor 2 Connector
(12)	Vehicle Speed Sensor (VSS)
(13)	Backup Lamp Switch (Manual Trans)
(14)	Heated Oxygen Sensor (HO2S) Bank 1 Sensor 1 Connector
(15)	Camshaft Position (CMP) Sensor Connector
(16)	Engine Oil Pressure (EOP) Sensor Connector
(17)	Engine Coolant Temperature (ECT) Sensor Connector
(18)	Idle Air Control (IAC) Motor Connector
(19)	S110
(20)	Throttle Position (TP) Sensor Connector
(21)	C153 (NP1/NP2/NP8)
(22)	C100
(23)	Fuse Block - Underhood C2
(24)	C152
(25)	Powertrain Control Module (PCM) C2
(26)	Powertrain Control Module (PCM) C1
(27)	A/C Compressor Clutch Connector
(28)	A/C Refrigerant Pressure Sensor Connector

Figure 8:

Lower Right Side of the Engine - Diesel


(1)	Engine - 6.6L Diesel
(2)	Engine Harness
(3)	G102
(4)	Auxiliary Negative Battery Ground
(5)	Starter Relay Terminal
(6)	Starter Solenoid

Figure 9:

Left Side of the Engine (4.8, 5.3, and 6.0L)


(1)	Generator Connector
(2)	Evaporative Emission (EVAP) Canister Purge Soleniod
(3)	S104
(4)	C148
(5)	Manifold Absolute Pressure (MAP) Sensor Connector
(6)	Knock Sensor (KS) Connector
(7)	Knock Sensor (KS) Connector
(8)	G104
(9)	Camshaft Position (CMP) Sensor Connector
(10)	Throttle Actuator Control (TAC) Connector
(11)	C153
(12)	G102
(13)	C100
(14)	Fuse Block - Underhood C2
(15)	C152
(16)	Powertrain Control Module (PCM) C2
(17)	Powertrain Control Module (PCM) C1
(18)	S110
(19)	S103

Figure 10:

Right Side of the Engine (4.8, 5.3, and 6.0L)


(1)	Manifold Absolute Pressure (MAP) Sensor Connector
(2)	S102
(3)	Auxiliary Battery Relay Connector (TP2)
(4)	Evaporative Emission (EVAP) Canister Purge Soleniod
(5)	Throttle Actuator Control (TAC) Connector
(6)	Coolant Level Switch Connector
(7)	Intake Air Temperature (IAT)/ Mass Air Flow (MAF) Sensor Connector
(8)	A/C Refrigerant Pressure Sensor Connector
(9)	A/C Compressor Clutch Connector
(10)	A/C Low Pressure Switch Connector
(11)	Engine Oil Level Switch Connector
(12)	Camshaft Position (CMP) Sensor Connector
(13)	Engine Oil Pressure (EOP) Sensor Connector

Figure 11:

Rear of the Engine (4.8, 5.3, and 6.0L)


(1)	Heated Oxygen Sensor (HO2S) Bank 2 Sensor 1 Connector (Automatic)
(2)	Heated Oxygen Sensor (HO2S) Bank 2 Sensor 2 Connector (Automatic)
(3)	Heated Oxygen Sensor (HO2S) Bank 2 Sensor 1 Connector (Manual)
(4)	Heated Oxygen Sensor (HO2S) Bank 2 Sensor 2 Connector (Manual)
(5)	Heated Oxygen Sensor (HO2S) Bank 1 Sensor 2 Connector (Manual)
(6)	Vehicle Speed Sensor (VSS) Connector
(7)	Backup Lamp Switch Connector
(8)	Heated Oxygen Sensor (HO2S) Bank 1 Sensor 1 Connector (Manual)
(9)	Heated Oxygen Sensor (HO2S) Bank 1 Sensor 2 Connector (Automatic)
(10)	Park/Neutral Position Switch Connector
(11)	Heated Oxygen Sensor (HO2S) Bank 1 Sensor 1 Connector (Automatic)

Figure 12:

Diesel Engine


(1)	C105
(2)	C100
(3)	C152
(4)	C106 (PTO)
(5)	S163
(6)	S103
(7)	C107
(8)	C108
(9)	C113
(10)	C110
(11)	C111
(12)	C175
(13)	C145 (PTO)
(14)	S150
(15)	S164
(16)	S165
(17)	S102
(18)	C153 (NP1/NP2/NP8)

Figure 13:

Left Side of the Engine (8.1L)


(1)	S163 (PTO)
(2)	S132
(3)	S164 (PTO)
(4)	S102
(5)	S151
(6)	S103
(7)	C155
(8)	Fuse Block - Underhood C2
(9)	PTO Relay Connector
(10)	S104
(11)	Throttle Actuator Control (TAC) Module C1
(12)	Heated Oxygen Sensor (HO2S) Bank 1 Sensor 1
(13)	Knock Sensor (KS) - Bank 1
(14)	C100
(15)	C152
(16)	C106 (PTO)
(17)	S165 (4WD w/MW7 only)
(18)	S110
(19)	G102
(20)	Powertrain Control Module (PCM) C2
(21)	Powertrain Control Module (PCM) C1
(22)	Transmission Control Module (TCM) C1
(23)	Transmission Control Module (TCM) C2

Figure 14:

Right Side of the Engine (8.1L)


(1)	Auxiliary Battery Relay Connector (TP2)
(2)	A/C Low Pressure Switch Connector
(3)	Manifold Absolute Pressure (MAP) Sensor
(4)	Engine Coolant Temperature (ECT) Sensor
(5)	C149
(6)	S157
(7)	Coolant Level Switch Connector
(8)	S160
(9)	Throttle Actuator Control (TAC) Motor Connector C1
(10)	C153
(11)	A/C Compressor Clutch Connector
(12)	A/C Refrigerant Pressure Sensor Connector
(13)	Knock Sensor (KS) - Bank 2
(14)	Engine Oil Level Switch Connector
(15)	Starter Solenoid Power
(16)	Heated Oxygen Sensor (HO2S) Bank 2 Sensor 1

Figure 15:

Rear of the Engine (8.1L)


(1)	Heated Oxygen Sensor (HO2S) Bank 2 Sensor 1
(2)	Automatic Transmission Input Shaft Speed (At ISS) Sensor
(3)	Heated Oxygen Sensor (HO2S) Bank 1 Sensor 2
(4)	Heated Oxygen Sensor (HO2S) Bank 2 Sensor 2
(5)	Vehicle Speed Sensor (VSS)
(6)	Park Neutral Position (PNP) Switch Connector
(7)	C145 (PTO)
(8)	Heated Oxygen Sensor (HO2S) Bank 2 Sensor 1

Figure 16:

SEO Harness Routing


(1)	C202
(2)	Stop Lamp Switch Connector
(3)	C160 (5X7, 5Y0)
(4)	C119 (9L4)
(5)	C250
(6)	C216
(7)	S223
(8)	S220
(9)	Roof Beacon Switch Connector (5X7, 5Y0, 5G4, TRW)
(10)	Dash Panel
(11)	Fuse Block - Mobile Radio (9L4)
(12)	S222
(13)	S221
(14)	Blunt Cut Wires (9L4)
(15)	Relay Block - I/P C5
(16)	Relay Block - I/P C8
(17)	C210
(18)	Park Brake Switch Connector
(19)	Clutch Pedal Position (CPP) Switch

Figure 17:

Instrument Panel


(1)	C104 (YE9)
(2)	C106 (PTO)
(3)	Fuse Block Underhood - C1
(4)	S214 (NP8)
(5)	S202
(6)	S213
(7)	S205
(8)	C222 (Except HP2)
(9)	C306
(10)	C249
(11)	S210 (UQ7 and Y91)
(12)	C201
(13)	S218 (CJ2)
(14)	C221
(15)	C206 (HP2)
(16)	C154 (NP1 or NP8)
(17)	C102

Figure 18:

Lower Left of the I/P


(1)	C160
(2)	C119
(3)	Stop Lamp Switch
(4)	C216
(5)	C202
(6)	C250
(7)	Brake/Clutch Jumper Harness
(8)	S219
(9)	C210
(10)	Park Brake Switch Connector
(11)	Relay Block - I/P Connector
(12)	S215
(13)	Clutch Pedal Position Switch

Figure 19:

Left Front Door Harness


(1)	Door Latch Assembly
(2)	Door Frame
(3)	Fuse Block - I/P C3
(4)	Power Window Motor Connector

Figure 20:

Right Front Door Harness


(1)	Door Frame
(2)	Door Latch Assembly
(3)	Power Window Motor Connector
(4)	Junction Block - I/P C2

Figure 21:

Driver Seat (1 of 2)


(1)	C321
(2)	Seat Adjuster Switch - Driver
(3)	Memory Seat Module - C4
(4)	Memory Seat Module - C3
(5)	Seat Bolster/Lumbar Switch - Driver
(6)	Seat Recliner Motor - Driver
(7)	C305
(8)	C323
(9)	C325
(10)	C322
(11)	Seat Rear Vertical Motor - Driver
(12)	Seat Front Vertical Motor - Driver
(13)	Memory Seat Module - C2
(14)	Memory Seat Module - C1
(15)	Seat Horizontal Motor - Driver
(16)	C320

Figure 22:

Driver Seat (2 of 2)


(1)	Seat Bolster Motor - Driver
(2)	Seat Lumbar Motor - Driver
(3)	Heated Seat Element - Driver Cushion
(4)	C324
(5)	Seat Belt Switch Connector
(6)	Heated Seat Element - Driver Cushion Connector

Figure 23:

Front Passenger Seat (1 of 2) (w/ AN3)


(1)	Seat Horizontal Motor - Front Passenger
(2)	Seat Front Vertical Motor - Front Passenger
(3)	Seat Rear Vertical Motor - Front Passenger
(4)	C388
(5)	C326
(6)	C399
(7)	Seat Recliner Motor - Front Passenger
(8)	Seat Adjuster Switch - Front Passenger
(9)	Seat Adjuster Switch Connector

Figure 24:

Front Passenger Seat (2 of 2) (w/ AN3)


(1)	Seat Bolster Motor - Front Passenger
(2)	Seat Lumbar Motor - Front Passenger
(3)	Heated Seat Element - Front Passenger Cushion Connector
(4)	C329

Figure 25:

Console Harness


(1)	Auxiliary Power Outlet - Front Connector
(2)	S333
(3)	S307
(4)	S303
(5)	Rear Seat Audio (RSA) Controller Connector
(6)	Auxiliary Power Outlet - Console Connector
(7)	Audio Amplifier Connector C2
(8)	Audio Amplifier Connector C1
(9)	Cigar Lighter
(10)	C306
(11)	Speaker - Subwoofer Connector
(12)	Speaker - Subwoofer (UQ7)

Figure 26:

Chassis and License Lamp Harnesses


(1)	Suspension Damper Solenoid - RF (ZX3)
(2)	Wheel Speed Sensor (WSS) - RF
(3)	Suspension Damper Solenoid - RR (ZX3)
(4)	License Lamp - Right
(5)	G401
(6)	License Lamp - Left
(7)	Junction Block - Rear Lamps C3
(8)	Suspension Damper Solenoid - LR (ZX3)
(9)	Fuel Pump and Sender Assembly/Fuel Tank Pressure (FTP) Sensor Connectors
(10)	Evaporative Emission (EVAP) Canister Vent Solenoid
(11)	S312
(12)	Electronic Brake Control Module (EBCM)
(13)	Stud #1 Trailer Connector
(14)	C198
(15)	Fuse Block - Underhood C9
(16)	Fuse Block - Underhood C3
(17)	C102
(18)	Wheel Speed Sensor (WSS) - LF
(19)	Suspension Damper Solenoid - LF (ZX3)
(20)	C152
(21)	S140
(22)	Brake Pressure Differential Switch

Figure 27:

Energy Storage Box (ESB), 42V, and Accessory Power Receptacle Harnesses (HP2)


(1)	S430
(2)	Chassis
(3)	S330
(4)	Energy Storage Box (ESB)
(5)	Battery Cable Harness (42V)
(6)	P105
(7)	C140
(8)	Starter/Generator Control Module
(9)	C122
(10)	C121
(11)	S121
(12)	Accessory Power Receptacle Harness
(13)	S120
(14)	S326
(15)	S332
(16)	S331
(17)	C341
(18)	Accessory Power Receptacle Connector

Figure 28:

Headliner and Brake/Clutch Harnesses


(1)	C355
(2)	S345
(3)	Courtesy/Reading Lamp - Rear Connector
(4)	Headliner
(5)	Center High Mounted Stop Lamp (CHMSL) Connector
(6)	Driver Side B - Pillar Molding
(7)	S321
(8)	Relay Block - I/P Connectors - C3 and C4
(9)	Park Brake Switch Connector
(10)	Stop Lamp Switch Connector
(11)	C205 (HP2)
(12)	C214
(13)	Inside Rearview Mirror Connector

Figure 29:

Body Harness


(1)	Fuse Block - I/P C4
(2)	G304
(3)	G330 (AL0)
(4)	G399 (AG2)
(5)	C396
(6)	G306
(7)	Headliner
(8)	Rear Window Defogger Grid Connector (Crew Cab)
(9)	Floor Panel
(10)	G305
(11)	C310
(12)	C305
(13)	Inflatable Restraint Sensing and Diagnostic Module (SDM) Connector
(14)	C221
(15)	C223
(16)	Relay Block - I/P C10
(17)	C222
(18)	Body Control Module (BCM) C6

Figure 30:

C210 and Relay Block - I/P - C4


(1)	Relay Block - I/P
(2)	Relay Block - I/P - C4
(3)	C210 - Roof Beacon Relay Inline