GM Service Manual Online
For 1990-2009 cars only

Name

Location

Locator View

Connector End View

1st - 2nd Shift Solenoid Valve

Inside the automatic transmission.

Automatic Transmission Electronic Component Views in Automatic Transmission

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2nd - 3rd Shift Solenoid Valve

Inside the automatic transmission.

Automatic Transmission Electronic Component Views in Automatic Transmission

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3rd - 2nd Shift Solenoid Valve

Inside the automatic transmission.

Automatic Transmission Electronic Component Views in Automatic Transmission

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2nd and 3rd Gear Block out Solenoid (MM6)

LH side of the manual transmission.

Engine Controls Component Views in Engine Controls 5.7L

Engine Controls Connector End Views in Engine Controls 5.7L

A/C Compressor Clutch

Part of the A/C compressor, attached to the RH front of the engine block.

HVAC Component Views in HVAC - Manual

HVAC Connector End Views in HVAC - Manual

A/C Compressor

Attached to the RH front of the engine block.

HVAC Component Views in HVAC-Manual

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A/C Diode

In the forward lamp harness, at the A/C compressor clutch coil connector.

HVAC Component Views in HVAC - Manual

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A/C Refrigerant Pressure Sensor

Attached to the A/C high side line.

Power and Grounding Component Views in Wiring Systems

HVAC Connector End Views in HVAC - Manual

Accelerator Pedal Position (APP) Sensor

Mounted to the accelerator pedal, LH footwell at the top of the accelerator pedal.

Lighting Systems Component Views in Lighting Systems

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Automatic Transmission

Rear of the vehicle, mounted to the front of the axle.

Engine Controls Component Views in Engine Controls 5.7L

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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

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Automatic Transmission Fluid Temperature (TFT) Sensor

Inside the automatic transmission.

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Body Control Module (BCM)

RH footwell, mounted to the toe board, behind the carpet

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Body Control System Connector End Views in Body Control Systems

Camshaft Position (CMP) Sensor

Top center, rear of the engine

Engine Controls Component Views in Engine Controls 5.7L

Engine Controls Connector End Views in Engine Controls 5.7L

Crankshaft Position (CKP) Sensor

Lower RH side of the engine, behind the starter

Engine Controls Component Views in Engine Controls 5.7L

Engine Controls Connector End Views in Engine Controls 5.7L

Cruise Control Switch

Part of the Multifunction Turn Signal Lever

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Cruise Control Release Switch

Mounted on the bracket in front of the brake pedal

Lighting Systems Component Views in Lighting Systems

Engine Controls Connector End Views in Engine Controls 5.7L

Data Link Connector (DLC)

LH side of instrument panel, below the steering column

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Data Link Communications Connector End Views in Data Link Communications

Electronic Brake Traction Control Module (EBTCM)

Front LH side of the engine compartment, mounted on the frame rail

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Antilock Brake System Connector End Views in Antilock Brakes

Electronic Suspension Control (ESC) Module

Rear compartment, inside the LH storage compartment

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Suspension Controls Connector End Views in Real Time Damping

Engine Coolant Temperature (ECT) Sensor

Front LH side of the engine below the generator

Engine Controls Component Views in Engine Controls 5.7L

Engine Controls Connector End Views in Engine Controls 5.7L

Engine Oil Level Sensor

RH side of the Oil Pan

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Engine Controls Connector End Views in Engine Controls 5.7L

Engine Oil Pressure (EOP) Sensor

Top center, rear of the engine

Engine Controls Component Views in Engine Controls 5.7L

Engine Controls Connector End Views in Engine Controls 5.7L

Evaporative Emission (EVAP) Canister Purge Valve

On the front LH side of the intake manifold

Engine Controls Component Views in Engine Controls 5.7L

Engine Controls Connector End Views in Engine Controls 5.7L

Evaporative Emission (EVAP) Vent Valve Solenoid

Mounted to the right side rear compartment brace, inside RR wheelhouse panel.

Engine Controls Component Views in Engine Controls 5.7L

Engine Controls Connector End Views in Engine Controls 5.7L

Front Knock Sensor

Center of the engine compartment, under the intake manifold.

Engine Controls Component Views in Engine Controls 5.7L

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Fuel Injectors

Top of the engine in the fuel rail below the fuel rail covers, above each cylinder

Engine Controls Component Views in Engine Controls 5.7L

Engine Controls Connector End Views in Engine Controls 5.7L

Fuel Tank Pressure Sensor

Inside LR Wheel House, Near Fuel Filler Neck

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Engine Controls Connector End Views in Engine Controls 5.7L

Generator

Front of the LH valve cover

Engine Controls Component Views in Engine Controls 5.7L

Engine Electrical Connector End Views in Engine Electrical

HVAC Control Assembly (C60)

Center of the instrument panel, under the radio

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HVAC Connector End Views in HVAC - Manual

HVAC Control Assembly (CJ2)

Center of the instrument panel, under the radio

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HVAC Connector End Views in HVAC - Automatic

Ignition Coil/Modules

On the valve cover at the top of each cylinder

Engine Controls Component Views in Engine Controls 5.7L

Engine Controls Connector End Views in Engine Controls 5.7L

Instrument Cluster

Top LH side of instrument panel, behind the steering wheel

Instrument Cluster and HUD Component Views in Instrument Panel Gauges and Console

Instrument Cluster and HUD Connector End Views in Instrument Panel, Gauges and Console

Instrument Panel Electrical Center

RH footwell, mounted on the toe board, behind the carpet

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Intake Air Temperature (IAT) Sensor

Front center of the engine, in the LH side of the intake duct

Engine Controls Component Views in Engine Controls 5.7L

Engine Controls Connector End Views in Engine Controls 5.7L

LF Heated Oxygen Sensor (HO2S) Bank 1 Sensor 1

In exhaust system forward of the catalytic converter

Engine Controls Component Views in Engine Controls 5.7L

Engine Controls Connector End Views in Engine Controls 5.7L

LH Engine Cooling Fan Motor

Front of the engine compartment behind the LH side of the radiator

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Cooling System Connector End Views in Engine Cooling

LH Fuel Level Sensor (W/Pump)

Inside the bottom of the LH fuel tank

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LR Heated Oxygen Sensor (HO2S) Bank 1 Sensor 2

In exhaust system rearward of the catalytic converter

Engine Controls Component Views in Engine Controls 5.7L

Engine Controls Connector End Views in Engine Controls 5.7L

Manifold Absolute Pressure (MAP) Sensor

Rear of the intake manifold

Engine Controls Component Views in Engine Controls 5.7L

Engine Controls Connector End Views in Engine Controls 5.7L

Mass Air Flow (MAF) Sensor

In the Intake Duct before Air Filter Assembly

Engine Controls Component Views in Engine Controls 5.7L

Engine Controls Connector End Views in Engine Controls 5.7L

Multifunction Turn Signal Lever

LH stalk of the steering column

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Park/Neutral Position (PNP) and Backup Switch

LH side of the transmission

Engine Controls Component Views in Engine Controls 5.7L

Engine Controls Connector End Views in Engine Controls 5.7L

Powertrain Control Module (PCM)

Behind the RF fender, between the wheelhouse and the dash panel, below the battery

Engine Controls Component Views in Engine Controls 5.7L

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Pressure Control Solenoid (PC Sol) Valve

Inside the transmission

Automatic Transmission Electronic Component Views in Automatic Transmission

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Rear Knock Sensor

Center of the engine below the intake manifold.

Engine Controls Component Views in Engine Controls 5.7L

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Reverse Inhibit Solenoid

Top of the transmission

Engine Controls Component Views in Engine Controls 5.7L

Engine Controls Connector End Views in Engine Controls 5.7L

RF Heated Oxygen Sensor (HO2S) Bank 2 Sensor 1

In exhaust system front of the catalytic converter

Engine Controls Component Views in Engine Controls 5.7L

Engine Controls Connector End Views in Engine Controls 5.7L

RH Engine Cooling Fan Motor

Front of the engine compartment behind the RH side of the radiator

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Cooling System Connector End Views in Engine Cooling

RH Fuel Level Sensor

Inside the Bottom of the RH Fuel Tank

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Engine Controls Connector End Views in Engine Controls 5.7L

RR Heated Oxygen Sensor (HO2S) Bank 2 Sensor 2

In exhaust system rearward of the catalytic converter

Engine Controls Component Views in Engine Controls 5.7L

Engine Controls Connector End Views in Engine Controls 5.7L

Secondary Air Injection (AIR) Pump

LH front outboard of the skid bar

Engine Controls Component Views in Engine Controls 5.7L

Engine Controls Connector End Views in Engine Controls 5.7L

Secondary Air Injection (AIR) Solenoid

Behind the RF Fender, between the wheel house and dash panel, above the PCM

Engine Controls Component Views in Engine Controls 5.7L

Engine Controls Connector End Views in Engine Controls 5.7L

Star Connector #1

Instrument panel harness, serial data, LH side of the Body Control Module (BCM)

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Stoplamp Switch

Mounted on the bracket in front of the brake pedal

Lighting Systems Component Views in Lighting Systems

Lighting Systems Connector End Views in Lighting Systems

Throttle Actuator Control (TAC) Module

Behind the RF fender, between the wheelhouse and the dash panel, below the battery, attached to the Powertrain Control Module (PCM)

Engine Controls Component Views in Engine Controls 5.7L

Electronic Throttle Actuator Control Module Connector End Views in Engine Controls 5.7L

Throttle Actuator Control (TAC) Motor

LH side of the throttle body

Engine Controls Component Views in Engine Controls 5.7L

Engine Controls Connector End Views in Engine Controls 5.7L

Throttle Position (TP) Sensor

RH side of the throttle body

Engine Controls Component Views in Engine Controls 5.7L

Engine Controls Connector End Views in Engine Controls 5.7L

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

Inside the automatic transmission

Automatic Transmission Electronic Component Views in Automatic Transmission

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Torque Converter Clutch Solenoid (TCC SOL) Valve

Inside the automatic transmission

Automatic Transmission Electronic Component Views in Automatic Transmission

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Transmission Fluid Temperature (TFT) Sensor (MM6/Europe)

Inside the automatic transmission.

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Underhood Electrical Center

RH side of the engine compartment, between the wheelhouse and the dash panel, front of the battery

Engine Controls Component Views in Engine Controls 5.7L

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Variable Effort Steering Actuator

LH side of the steering gear

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Vehicle Speed Sensor (VSS)

Top RH side of the differential

Engine Controls Component Views in Engine Controls 5.7L

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C102 (20 cavities)

Instrument panel harness to forward lamp harness, RH side rear of engine compartment

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Inline Harness Connector End Views in Wiring Systems

C109 (8 cavities)

LH ignition control module jumper harness to engine harness, top center of the valve cover

Engine Controls Component Views in Engine Controls 5.7L

Inline Harness Connector End Views in Wiring Systems

C110 (8 cavities)

RH ignition control module jumper harness to engine harness, top center of the valve cover

Engine Controls Component Views in Engine Controls 5.7L

Inline Harness Connector End Views in Wiring Systems

C112 (2 cavities)

Knock sensor (KS) jumper harness to engine harness, top rear of the engine mounted to the vacuum hose

Engine Controls Component Views in Engine Controls 5.7L

Inline Harness Connector End Views in Wiring Systems

C140 (10 cavities)

Transmission harness to forward lamp harness, RH side in engine compartment, below the battery

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Inline Harness Connector End Views in Wiring Systems

C142 (20 cavities)

Engine harness to transmission harness, RH side rear of engine compartment, below the battery

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Inline Harness Connector End Views in Wiring Systems

C144 (20 cavities)

Engine harness to transmission harness, RH side rear of engine compartment, below the battery

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Inline Harness Connector End Views in Wiring Systems

C146 (10 cavities)

Transmission harness to instrument panel harness, RH side rear of engine compartment, below the battery

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Inline Harness Connector End Views in Wiring Systems

C150 (20 cavities)

Forward lamp harness to Engine harness, RH side rear of engine compartment, below the battery

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Inline Harness Connector End Views in Wiring Systems

C204 (4 cavities)

Instrument panel harness to front body harness, RH side rear of engine compartment, below the battery

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Inline Harness Connector End Views in Wiring Systems

C217 (4 cavities)

Instrument panel harness to steering column harness, LH side of the steering column, attached to the lower instrument panel bar

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Inline Harness Connector End Views in Wiring Systems

C402 (10 cavities)

Transmission harness to fuel tank jumper harness.

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Inline Harness Connector End Views in Wiring Systems

C408 (4 cavities)

Fuel tank jumper harness to LH Fuel Tank

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Inline Harness Connector End Views in Wiring Systems

P200

Instrument panel harness, RH side of Instrument panel on dash panel

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P401

Transmission harness, LH rear of vehicle

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S100

RH Ignition control module jumper, approximately 6.0 cm (2.3 in) from connector C110 breakout (CKT 151)

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S101

LH Ignition control module jumper, approximately 6.0 cm (2.3 in) from connector C109 breakout (CKT 151)

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S102

RH Ignition control module jumper, approximately 5.0 cm (1.9 in) from breakout for connector C110 (CKT 39)

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S103

LH Ignition control module jumper, approximately 5.0 cm (1.9 in) from breakout for connector C109 (CKT 39)

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S104

RH Ignition control module jumper, approximately 4.0 cm (1.5 in) from breakout for ignition coil/module 4 (CKT 2129)

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S105

LH Ignition control module jumper, approximately 4.0 cm (1.5 in) from breakout for ignition coil/module 5 (CKT 2129)

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S120

Engine harness, approximately 15.0 cm (5.9 in) from the main harness in the branch leading to the Powertrain Control Module (PCM) connectors (CKT451)

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S206

Instrument panel harness, approximately 5 cm (1.9 in) from the blower motor control module connector breakout (CKT 1132)

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S213

Instrument panel harness, approximately 7.5 cm (2.9 in) right of the brake switch connectors breakout (CKT 339)

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S400

Transmission harness, approximately 6.5 cm (2.5 in) from the C402 breakout (CKT 339)

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S402

Transmission harness, approximately 55.0 cm (21.6 in) from RR shock absorber breakout (CKT 150)

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S410

Fuel tank jumper harness, approximately 81.5 cm (32 in) from C408 breakout (CKT 720)

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SP100 - Splice Pack 100

Forward lamp harness, grounded to G102, at the RH headlamp opening door assembly connector breakout (CKT150)

Power and Grounding Component Views in Wiring Systems

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SP122 - Splice Pack 122

Engine harness, approximately one foot from breakout for starter solenoid, under the rear left corner of the battery tray, grounded to G104 (CKT150)

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SP201 - Splice Pack 201

Instrument panel harness, grounded to G201 (CKT 150)

Power and Grounding Component Views in Wiring Systems

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SP208 - Splice Pack 208

Instrument panel harness, RH side of Instrument panel, grounded to G104 (CKT 851)

Power and Grounding Component Views in Wiring Systems

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G102

Forward lamp harness, on the top of the RH frame rail, behind the RH headlamp assembly, ground for SP100 (CKT 250)

Power and Grounding Component Views in Wiring Systems

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G104

Instrument panel harness, below the battery tray, on the RH frame rail, ground for SP208 (CKT 851)

Power and Grounding Component Views in Wiring Systems

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G105

Engine harness, LH side bottom of engine, ground for SP122 (CKT 150)

Engine Controls Component Views in Engine Controls 5.7L

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G106

Engine harness, RH side of the engine, above the starter (CKT 451)

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G107

Engine harness, LH side top, rear of engine (CKT 151)

Engine Controls Component Views in Engine Controls 5.7L

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G201

Instrument panel harness, at base of LH A-Pillar, ground for SP201 and SP203 (CKT150 and CKT 351)

Power and Grounding Component Views in Wiring Systems

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G401 (F45)

Transmission harness, rear of the vehicle, on the inner side of the LH frame rail (CKT 150)

Power and Grounding Component Views in Wiring Systems

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G401 (W/O F45)

Transmission harness, rear of the vehicle, on the inner side of the LH frame rail (CKT 150)

Power and Grounding Component Views in Wiring Systems

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