GM Service Manual Online
For 1990-2009 cars only

Name

Location

Locator View

Connector End View

1-2 Shift Solenoid (1-2 SS) Valve

Inside the automatic transmission

Automatic Transmission Electronic Component Views in Automatic Transmission

Automatic Transmission Internal Connector End Views in Automatic Transmission

2-3 Shift Solenoid (2-3 SS) Valve

Inside the automatic transmission

Automatic Transmission Electronic Component Views in Automatic Transmission

Automatic Transmission Internal Connector End Views in Automatic Transmission

3-2 Shift Solenoid (3-2 SS) Valve Assembly

Inside the automatic transmission

Automatic Transmission Electronic Component Views in Automatic Transmission

Automatic Transmission Internal Connector End Views in Automatic Transmission

A/C Compressor

Top LH front of engine

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A/C Compressor Clutch

Part of A/C Compressor

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HVAC Connector End Views in HVAC

A/C Compressor Clutch Diode

In engine harness breakout, 7.5  cm from the breakout to the A/C Compressor and high pressure switch

Harness Routing Views in Wiring Systems

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A/C Compressor Clutch Relay

In the underhood fuse block

Power and Grounding Component Views in Wiring Systems

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A/C Compressor High Pressure Cutoff Switch

Rear of A/C Compressor

Harness Routing Views in Wiring Systems

HVAC Connector End Views in HVAC Systems

A/C Compressor Cycling Switch

At the A/C Accumulator

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HVAC Connector End Views in HVAC Systems

Automatic Transmission

Rear of the engine

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Automatic Transmission Fluid Pressure (TFP) Manual Valve Position Switch

Inside the automatic transmission

Automatic Transmission Electronic Component Views in Automatic Transmission

Automatic Transmission Internal Connector End Views in Automatic Transmission

Body Control Module (BCM)

Lower rear of IP on the heater assembly

Body Control System Component Views in Body Control Systems

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Body Control Module (BCM) Connector C1 (24 Cavities)

Lower rear of IP on the heater assembly

Body Control System Component Views in Body Control Systems

Body Control System Connector End Views in Body Control Systems

Body Control Module (BCM) Connector C2 (24 Cavities)

Lower rear of IP on the heater assembly

Body Control System Component Views in Body Control Systems

Body Control System Connector End Views in Body Control Systems

Body Relay Block

RH side of IP, near IP fuse Block

Power and Grounding Component Views in Wiring Systems

Power and Grounding Connector End Views in Wiring Systems

Camshaft Position (CMP) Sensor

Rear of Distributor

Engine Controls Component Views in Engine Controls

Engine Controls Connector End Views in Engine Controls

Central Sequential Fuel Injection (CSFI)

Top center of engine, forward of distributor

Engine Controls Component Views in Engine Controls

Engine Controls Connector End Views in Engine Controls

Clutch Pedal Position (CPP) Switch

On clutch pedal support bracket

Engine Electrical Component Views in Engine Electrical

Engine Electrical Connector End Views in Engine Electrical

Crankshaft Position (CKP) Sensor

Below RH front of engine near harmonic balancer

Engine Controls Component Views in Engine Controls

Engine Controls Connector End Views in Engine Controls

Cruise Control Module (CCM)

LH rear of engine compartment on cowl

Cruise Control Component Views in cruise control

Cruise Control Connector End Views in Cruise Control

Data Link Connector (DLC)

Lower RH of the IP

Data Link Communications Component Views in Data Link Communications

Data Link Communications Connector End Views in Wiring Systems

Distributor

Top rear of engine

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Driver Information Display Module

In the overhead console in the passenger compartment

Harness Routing Views in Wiring Systems

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Electronic Brake Control Module (EBCM)

RH front fenderwell between the Underhood Fuse Block and P100

Antilock Brake System Component Views in Antilock Brakes

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Electronic Brake Control Module (EBCM) Connector C1 (10 Cavities)

Body harness connector on LH of Electronic Brake Control Module/Brake Pressure Modulator Valve

Antilock Brake System Component Views in Antilock Brakes

Antilock Brake System Connector End Views in Antilock Brakes

Electronic Brake Control Module (EBCM) Connector C2 (4 Cavities)

Body harness connector on LH of Electronic Brake Control Module/Brake Pressure Modulator Valve

Antilock Brake System Component Views in Antilock Brakes

Antilock Brake System Connector End Views in Antilock Brakes

Electronic Brake Control Module (EBCM) Connector C3 (2 Cavities)

Body harness connector on LH of Electronic Brake Control Module/Brake Pressure Modulator Valve

Antilock Brake System Component Views in Antilock Brakes

Antilock Brake System Connector End Views in Antilock Brakes

Electronic Climate Control (ECC)Module

Center of Instrument Panel, below radio

HVAC Component Views in HVAC Systems

HVAC Connector End Views in HVAC systems

Engine Coolant Temperature (ECT) Sensor

Front of engine near thermostat housing

Engine Controls Component Views in Engine Controls

Engine Controls Connector End Views in Engine Controls

Engine Oil Pressure Gauge Sensor

Top rear of engine below distributor

Engine Controls Component Views in Engine Controls

Engine Controls Connector End Views in Engine Controls

Evaporative Emissions Canister Purge Valve

Top RH center of engine, near fuel injector connector

Engine Controls Component Views in Engine Controls

Engine Controls Connector End Views in Engine Controls

Evaporative Emissions Canister Vent Valve

Crossmember area of fuel tank, rear center of crossmember behind tank

Engine Controls Component Views in Engine Controls

Engine Controls Connector End Views in Engine Controls

Exhaust Gas Recirculation Valve

Top front of engine near drive belt

Engine Controls Component Views in Engine Controls

Engine Controls Connector End Views in Engine Controls

Front Axle Switch

Front axle, right of differential

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Transfer Case Control Connector End Views in Transfer Case

Fuel Pump and Sender

Top of fuel tank

Engine Controls Component Views in Engine Controls

Engine Controls Connector End Views in Engine Controls

Fuel Pump Relay

In the underhood fuse block

Power and Grounding Component Views in Wiring Systems

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Fuel Tank Pressure Sensor

Top of fuel tank, three wire connector

Engine Controls Component Views in Engine Controls

Engine Controls Connector End Views in Engine Controls

Generator

RH front of engine

Engine Electrical Component Views in Engine Electrical

Engine Electrical Connector End Views in Engine Electrical

Heated Oxygen Sensor (HO2S), Bank 1, Sensor 1

On the rear of the LH exhaust pipe on the left side of the transmission

Engine Controls Component Views in Engine Controls

Engine Controls Connector End Views in Engine Controls

Heated Oxygen Sensor(HO2S), Bank 1, Sensor 3

Rear of the catalytic converter in the exhaust pipe

Engine Controls Component Views in Engine Controls

Engine Controls Connector End Views in Engine Controls

Heated Oxygen Sensor (HO2S), Bank 2, Sensor 1

RH rear of engine in exhaust pipe

Engine Controls Component Views in Engine Controls

Engine Controls Connector End Views in Engine Controls

Idle Air Control Valve (IAC) Valve

Top of engine, on the throttle body

Engine Controls Component Views in Engine Controls

Engine Controls Connector End Views in Engine Controls

Ignition Control Module (ICM) (Part of Ignition Coil Assembly)

Top RH side of engine

Engine Controls Component Views in Engine Controls

Engine Controls Connector End Views in Engine Controls

Ignition Coil (part of the Ignition Coil assembly)

Top RH side of engine

Engine Controls Component Views in Engine Controls

Engine Controls Connector End Views in Engine Controls

Instrument Cluster

In the IP ahead of the steering column

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Intake Air Temperature Sensor

LH front of engine compartment in air intake duct

Engine Controls Component Views in Engine Controls

Engine Controls Connector End Views in Engine Controls

IP Fuse Block

RH side of the IP near the left front side door jamb switch

Power and Grounding Component Views in Wiring Systems

Power and Grounding Connector End Views in Wiring Systems

Knock Sensor

Top rear of engine above transmission bell housing

Engine Controls Component Views in Engine Controls

Engine Controls Connector End Views in Engine Controls

Manifold Absolute Pressure (MAP) Sensor

Top center of engine

Engine Controls Component Views in Engine Controls

Engine Controls Connector End Views in Engine Controls

Manual Transmission

Behind the engine

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Mass Air Flow (MAF) Sensor

LH front of engine compartment on air intake duct

Engine Controls Component Views in Engine Controls

Engine Controls Connector End Views in Engine Controls

Park/Neutral Position (PNP) and Backup Lamp Switch

LH side of transmission

Harness Routing Views in Wiring Systems

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Park/Neutral Position (PNP) and Backup Lamp Switch Connector C1 (7 cavities)

LH side of transmission

Harness Routing Views in Wiring Systems

Automatic Transmission Inline Harness Connector End View in Automatic Transmission

Park/Neutral Position (PNP) and Backup Lamp Switch C2 (4 cavities)

LH side of transmission

Harness Routing Views in Wiring Systems

Automatic Transmission Electronic Component Views in Automatic Transmission

Pressure Control Solenoid (PC SOL) Valve

Inside the automatic transmission

Automatic Transmission Electronic Component Views in Automatic Transmission

Automatic Transmission Internal Connector End Views in Automatic Transmission

TCC/Stop Lamp Switch

Mounted on brake pedal

Engine Electrical Component Views in Engine Electrical

Automatic Transmission Inline Harness Connector End View in Automatic Transmission

Throttle Position (TP) Sensor

Top LH side of engine, on the throttle body

Engine Controls Component Views in Engine Controls

Engine Controls Connector End Views in Engine Controls

Torque Converter Clutch Pule Width Modulation Solenoid (TCC PWM SOL) Valve

Inside the automatic transmission

Automatic Transmission Electronic Component Views in Automatic Transmission

Automatic Transmission Internal Connector End Views in Automatic Transmission

Torque Converter Clutch Solenoid (TCC SOL) Valve

Inside the automatic transmission

Automatic Transmission Electronic Component Views in Automatic Transmission

Automatic Transmission Internal Connector End Views in Automatic Transmission

Transfer Case

To the rear of the transmission

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Transfer Case Control Module (TCCM)

LH lower kick panel below the IP

Transfer Case Control Component Views in Transfer Case

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Transfer Case Control Module (TCCM) Connector C1(32 Cavities)

Upper connector

Transfer Case Control Component Views in Transfer Case

Transfer Case Control Connector End Views in Transfer Case

Transmission Fluid Temperature (TFT) Sensor

Part of the automatic transmission fluid pressure (TFP) manual valve position switch

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Underhood Fuse Block

On top of the right inner wheelwell near the battery

Power and Grounding Component Views in Wiring Systems

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Underhood Fuse Block Connector C1 (68 Cavities)

Below the Underhood Fuse Block

Power and Grounding Component Views in Wiring Systems

Power and Grounding Connector End Views in Wiring Systems

Underhood Fuse Block Connector C2 (68 Cavities)

Below the Underhood Fuse Block

Power and Grounding Component Views in Wiring Systems

Power and Grounding Connector End Views in Wiring Systems

Underhood Fuse Block Connector C3 (32 Cavities)

Below the Underhood Fuse Block

Power and Grounding Component Views in Wiring Systems

Power and Grounding Connector End Views in Wiring Systems

Vehicle Control Module (VCM)

LH side of engine compartment

Engine Controls Component Views in Engine Controls

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Vehicle Control Module (VCM) Connector C1 (32 Cavities)

LH side of engine compartment

Engine Controls Component Views in Engine Controls

Engine Controls Connector End Views in Engine Controls

Vehicle Control Module (VCM) Connector C2 (32 Cavities)

LH side of engine compartment

Engine Controls Component Views in Engine Controls

Engine Controls Connector End Views in Engine Controls

Vehicle Control Module (VCM) Connector C3 (32 Cavities)

LH side of engine compartment

Engine Controls Component Views in Engine Controls

Engine Controls Connector End Views in Engine Controls

Vehicle Control Module (VCM) Connector C4 (24 Cavities)

LH side of engine compartment

Engine Controls Component Views in Engine Controls

Engine Controls Connector End Views in Engine Controls

Vehicle Speed Sensor (VSS), LR

Top left rear of the transfer case, near the drive shaft

Transfer Case Control Component Views in Transfer Case

Automatic Transmission Inline Harness Connector End View in Automatic Transmission

C100 (6 Cavities)

Engine harness to oxygen sensor harness, RH rear of engine compartment, near the accumulator

Harness Routing Views in Wiring Systems

Inline Harness Connector End Views in Wiring Systems

C101(10 Cavities)

Engine harness to body harness, RH engine compartment, near VCM

Harness Routing Views in Wiring Systems

Inline Harness Connector End Views in Wiring Systems

C104 (6 Cavities)

Chassis to engine harness, LH side of transmission

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Inline Harness Connector End Views in Wiring Systems

C105 (4Cavities)

Engine harness to LH front heated oxygen sensor pigtail connector, on the LH side of the transmission

Harness Routing Views in Wiring Systems

Inline Harness Connector End Views in Wiring Systems

C114 (2 Cavities)

Body harness to front axle switch extension harness, LH center of engine compartment, near the electronic brake control module

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Transfer Case Control Connector End Views in Transfer Case

C125 (4 Cavities)

Oxygen sensor harness to post-converter heated oxygen sensor pigtail connector, chassis harness, near the post-converter (bank 1, sensor 3) heated oxygen sensor

Harness Routing Views in Wiring Systems

Inline Harness Connector End Views in Wiring Systems

C126 (4 Cavities)

Oxygen sensor harness to RH front heated oxygen sensor pigtail connector, chassis harness, near the RH Front (Bank 2, Sensor 1) Heated Oxygen Sensor

Harness Routing Views in Wiring Systems

Inline Harness Connector End Views in Wiring Systems

C130 (7 Cavities)

Chassis harness to forward lamp harness connector

Harness Routing Views in Wiring Systems

Inline Harness Connector End Views in Wiring Systems

C175 (13 Cavities)

Engine harness to automatic transmission connector, RH rear of the automatic transmission

Harness Routing Views in Wiring Systems

Automatic Transmission Inline Harness Connector End View in Automatic Transmission

C203 (116 Cavities)

Body harness to IP harness, LH side of IP

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Inline Harness Connector End Views in Wiring Systems

C209 (16 Cavitie)

Body harness to dome harness, LH front of IP

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Inline Harness Connector End Views in Wiring Systems

G102

(Circuit 350) In the engine harness, LH rear of engine block

Power and Grounding Component Views in Wiring Systems

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G103

(Circuit 35) In the engine harness, LH rear of engine block

Power and Grounding Component Views in Wiring Systems

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G104

(Circuit 450) In the Engine Harness, RH rear of engine block

Power and Grounding Component Views in Wiring Systems

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G105

(Circuit 451) In the engine harness, RH rear of engine block

Power and Grounding Component Views in Wiring Systems

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G117

LH rear of engine compartment, near cruise control module

Harness Routing Views in Wiring Systems

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G200

(Circuit 1850) In the body Harness RH front of IP, above grommet P100

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G201

(Circuit 1850) In the body harnessRH front of IP, above grommet P100

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G402

(Circuits 22 and 1650) In the chassis harness near the top center of the second cross-member from the rear, with the fuel filler neck ground strap

Harness Routing Views in Wiring Systems

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P100

IP bulkhead pass-through in the RH rear of the engine compartment

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S100

(Circuit 452) In the engine harness between the breakouts for the VCM connector C2 and the engine coolant temperature connector, 10.5 cm (4.2 in.) from the VCM C2 connector breakout

Engine Electrical Component Views in Engine Electrical

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S101

(Circuit 474) In the engine harness between the breakouts to the ignition control module and the fuel injector connector, 5 cm (2 in) from the breakout to the ignition control module

Engine Electrical Component Views in Engine Electrical

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S102

(Circuit 470) In the engine Harness between the breakouts for the ignition control module and the fuel injector connector, 5 cm (2 in) from the breakout to the fuel injection connector

Engine Electrical Component Views in Engine Electrical

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S103

(Circuit 350) In the engine harness breakout to the A/C compressor clutch connector and A/C compressor cutoff switch connector, 7.5 cm (3 in) from the breakout

Harness Routing Views in Wiring Systems

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S104

(Circuit 59) In the engine harness breakout to the A/C compressor clutch connector and A/C compressor cutoff switch connector, 7.5 cm (3 in) from the breakout

Harness Routing Views in Wiring Systems

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S106

(Circuit 351) In the engine harness between the breakouts to the connector for the engine coolant temperature sensor and the VCM connector C2, 27.5 cm (11 in) from the breakout to the VCM connector C2

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S113

(Circuit 1020) In the body harness between the breakouts to the power radio antenna connector and the underhood lamp connector, 19.5 cm (7.8 in) from the power radio antenna connector breakout

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S118

(Circuit 850) Body harness between the breakouts for the power radio antenna connector and the park lamp switch relay, 13 cm (5.2 in) from the breakout to the power radio antenna connector

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S125

(Circuit 1695) Body harness between the breakouts to the cruise control module and the EBCM connector C1, 6.5 cm (2.6 in) from the breakout to the EBCM

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S138

(Circuit 420) Body harness between the breakouts to the power radio antenna connector and the park lamp switch relay, 6.5 cm (2.6 in) from the breakout to the power radio antenna connector

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S140

(Circuit 514) Engine harness between the breakouts to the transfer case connectors and the vehicle speed sensor, RH rear, 10 cm (4 in) from the transfer case connector breakout.

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S150

(Circuit 539) Engine oxygen sensor harness between the breakouts to the RH Front and the post-catalytic oxygen sensor connectors, 10 cm (4 in) from the breakout to the RH front oxygen sensor connector

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S151

(Circuit 350) Engine oxygen sensor harness between the breakouts to the C 100 engine harness connector and the RH front oxygen sensor connector, 10 cm (4 in) from the breakout to the RH Front oxygen sensor connector

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S152

(Circuit 351 and 451) Engine harness between the breakouts for the LH rear and RH rear engine block grounds, 20 cm (8 in) from the breakout to the RH rear engine block ground

Power and Grounding Component Views in Wiring Systems

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S201

(Circuit 1807) Body harness 13 cm (5.2 in) from the BCM connector breakout toward the C 211 steering column harness connector

Power and Grounding Component Views in Wiring Systems

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S203

(Circuit 241) Body harness 39 cm (15.6 in) from the BCM connector breakout toward the C 211 steering column harness connector

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S207

(Circuit 817) Body harness 32.5 cm (13 in) from the BCM connector breakout toward the C 211 steering column harness connector

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S209

(Circuit 1850) Body harness 6.5 cm (2.6 in) from the BCM connector breakout toward the C 211 steering column harness connector

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SP423

(Circuits 470, 1650, and 2109 Splice Pack) Chassis harness on the front of crossmember near LH frame rail, near canister vent valve

Harness Routing Views in Wiring Systems

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