GM Service Manual Online
For 1990-2009 cars only

Name

Location

Locator View

Connector End View

A/C Compressor Clutch

Right hand lower front of the engine, on the A/C compressor

Engine Controls Component Views

Engine Controls Connector End Views

A/C Compressor Clutch Diode

Right hand front of the engine, near the A/C compressor in the harness

Engine Controls Component Views

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A/C Refrigerant Pressure Sensor

Right hand front of the engine, near the A/C compressor on the hose assembly

Engine Controls Component Views

Engine Controls Connector End Views

ABS/TCC Switch

Under the left hand of the instrument panel, near the brake pedal

Antilock Brake System Component Views in Antilock Brake Systems

Engine Controls Connector End Views

Automatic Transaxle

Lower left hand side of the engine compartment

Automatic Transmission Electronic Component Views

Automatic Transmission Internal Connector End Views

Bank #1 Knock Sensor

Lower front of the engine, left of the starter motor

Engine Controls Component Views

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Bank #2 Knock Sensor

Lower center back of the engine, below the exhaust manifold

Engine Controls Component Views

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Boost Control Solenoid

Left hand front of the engine, near the engine oil fill

Engine Controls Component Views

Engine Controls Connector End Views

Camshhaft Position (CMP) Sensor

Right hand of the engine, below the water pump

Engine Controls Component Views

Engine Controls Connector End Views

Crankshaft Position (CKP) Sensor

Lower right hand of the engine, behind the crank pulley

Engine Controls Component Views

Engine Controls Connector End Views

Cruise Control Module

Center rear of engine compartment, near brake master cylinder

Cruise Control Component Views in Cruise Control

Engine Controls Connector End Views

Data Link Connector (DLC)

Under left side of the instrument panel, left of steering column

Engine Controls Component Views

Engine Controls Connector End Views

Electronic Brake and Traction Control Module (EBTCM)

Left side front of the engine compartment, near the base of the radiator support

Antilock Brake System Component Views in Antilock Brake Systems

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Engine Coolant Temperature (ECT) Sensor

Left side front of the engine, near the thermostat housing

Engine Controls Component Views

Engine Controls Connector End Views

Engine Oil Level Switch

Center front of the engine, in the engine oil pan

Engine Controls Component Views

Engine Controls Connector End Views

Engine Oil Pressure Sensor

Right side rear corner of the engine, below the power steering pump

Engine Controls Component Views

Engine Controls Connector End Views

Evaporative Emissions (EVAP) Cannister Vent Solenoid

Below rear of vehicle, mounted on the evaporative emissions (EVAP) canister

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Engine Controls Connector End Views

Evaporative Emissions (EVAP) Purge Valve

Right side rear of the engine, near the generator

Engine Controls Component Views

Engine Controls Connector End Views

Exhaust Gas Recirculation (EGR) Valve

Left side rear of the engine, near the throttle body

Engine Controls Component Views

Engine Controls Connector End Views

Fuel Injectors

Top of the engine, in the intake runners

Engine Controls Component Views

Engine Controls Connector End Views

Fuel Pump Control Module

Right side of the rear compartment, near the wheel house

Engine Controls Component Views

Engine Controls Connector End Views

Fuel Tank Pressure Sensor

Mounted in the fuel tank unit

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Engine Controls Connector End Views

Fuel Tank Unit

Under center rear of the vehicle, in the fuel tank

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Engine Controls Connector End Views

Generator

Right side of the engine, near the power steering pump

Engine Controls Component Views

Engine Controls Connector End Views

Head-Up Display

Left side top of the instrument panel, under the upper instrument panel pad

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

Heated Oxygen Sensor 1(Bank 1 Sensor 1)

Center rear of the engine, in the exhaust manifold

Engine Controls Component Views

Engine Controls Connector End Views

Heated Oxygen Sensor 2 (Bank 1 Sensor 2)

Under the center of the vehicle, near the rear of the catalytic converter

Engine Controls Component Views

Engine Controls Connector End Views

IP Junction Block

Under the right hand of the instrument panel, near the rear of the instrument panel compartment

Power and Grounding Component Views in Wiring Systems

Power and Grounding Connector End Views in Wiring Systems

Idle Air Control (IAC) Valve

Left side of the engine, in the top of the throttle body

Engine Controls Component Views

Engine Controls Connector End Views

Ignition Control Module (ICM)

Right side top of the engine, under the ignition coils

Engine Controls Component Views

Engine Controls Connector End Views

Instrument Cluster

Left side of the instrument panel, above the steering column

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

Intake Air Temperature (IAT) Sensor

Left side front of the engine compartment, in the air intake duct

Engine Controls Component Views

Engine Controls Connector End Views

LH Cooling Fan Motor

Center front of the engine compartment, behind the radiator

Cooling System Component Views in Engine Cooling

Cooling System Connector End Views

Manifold Absolute Pressure (MAP) Sensor

Left side rear of the engine, near the exhaust gas recirculation valve

Engine Controls Component Views

Engine Controls Connector End Views

Mass Air Flow (MAF) Sensor

Center left side of the engine, on the top of the throttle body

Engine Controls Component Views

Engine Controls Connector End Views

Park/Neutral Position (PNP) Switch

Left side of the transaxle, below the exhaust gas recirculation valve

Engine Controls Component Views

Engine Controls Connector End Views

Powertrain Control Module (PCM)

Left side front of the engine compartment, in the air cleaner housing

Engine Controls Component Views

Powertrain Control Module Connector End Views

Rear Junction Block

Center right side rear of the passenger compartment, under the rear seat cushion

Power and Grounding Component Views in Wiring Systems

Power and Grounding Connector End Views in Wiring Systems

RH Cooling Fan Mototr

Center front of the engine compartment, behind the radiator

Cooling System Component Views in Engine Cooling

Engine Controls Connector End Views

Throttle Position Sensor

Center left side of the engine, on the front of the throttle body

Engine Controls Component Views

Engine Controls Connector End Views

Underhood Junction Block

Right side front of the engine compartment, near the battery

Power and Grounding Component Views in Wiring Systems

Power and Grounding Connector End Views in Wiring Systems

Vehicle Speed Sensor (VSS)

Right side rear of the transaxle, below the power steering pump

Engine Controls Component Views

Engine Controls Connector End Views

C100 (20 cavities)

Engine harness to the transaxle harness, left side front of the engine compartment below throttle body

Harness Routing Views in Wiring Systems

Automatic Transmission Internal Connector End Views

C101 (7 cavities)

Body harness to the engine harness, right side rear of the engine compartment near the strut tower

Harness Routing Views in Wiring Systems

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C102 (10 cavities)

Body harness to the engine harness, left side rear of the engine compartment near the washer reservoir

Power and Grounding Component Views in Wiring Systems

Inline Harness Connector End Views in Wiring Systems

C107 (8 cavities)

Engine harness to the ignition harness, right side front of the engine near the ignition coils

Power and Grounding Component Views in Wiring Systems

Inline Harness Connector End Views in Wiring Systems

C111 (1 cavity)

Engine harness to the knock sensor harness, right side rear of the engine below the power steering pump

Power and Grounding Component Views in Wiring Systems

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C113 (5 cavities)

Body harness to the forward lamp harness, left side of the engine compartment near the windshield washer reservoir

Power and Grounding Component Views in Wiring Systems

Inline Harness Connector End Views in Wiring Systems

C116 (10 cavities)

Body harness to the body harness, right side rear of the engine compartment near the windshield wiper motor

Power and Grounding Component Views in Wiring Systems

Inline Harness Connector End Views in Wiring Systems

C200 (16 cavities)

Body harness to the instrument panel harness, under left side of the instrument panel left of the steering column

Power and Grounding Component Views in Wiring Systems

Inline Harness Connector End Views in Wiring Systems

C420 (7 cavities)

Under center rear of the vehicle

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Engine Controls Connector End Views

G101

Right side rear of the engine, below the power steering pump

Power and Grounding Component Views in Wiring Systems

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G102

Center right side front of the engine, near the starter motor

Power and Grounding Component Views in Wiring Systems

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G105

Right side rear of engine compartment, near the base of the underhood junction block

Power and Grounding Component Views in Wiring Systems

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G202

Left side front of the passenger compartment, under the kick panel trim plate

Power and Grounding Component Views in Wiring Systems

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G400

Right side of the rear compartment, on the rear of the wheel house

Power and Grounding Component Views in Wiring Systems

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P100

Left side rear of the engine compartment, near the base of the windshield washer reservoir

Harness Routing Views in Wiring Systems

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P102

Right side rear of the engine compartment, below the windshield wiper motor

Harness Routing Views in Wiring Systems

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P403

Left side rear of the rear compartment, near the back of the wheel house

Harness Routing Views in Wiring Systems

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P410

Right side rear of the rear compartment, near the back of the wheel house

Harness Routing Views in Wiring Systems

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S103

In the engine harness, approx 27.5 cm (10.8 in) from the throttle position sensor

Harness Routing Views in Wiring Systems

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S105

In the engine harness, approx 47.5 cm (18.7 in) from the powertrain control module

Harness Routing Views in Wiring Systems

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S106

In the engine harness, approx 18 cm (7.1 in) from the A/C compressor clutch

Harness Routing Views in Wiring Systems

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S107

In the engine harness, approx 23 cm (9.1 in) from the A/C compressor clutch

Harness Routing Views in Wiring Systems

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S108

In the engine harness, approx 6 cm (2.4 in) from the cruise control module breakout

Harness Routing Views in Wiring Systems

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S115

In the engine harness, approx 15 cm (5.9 in) from cruise control module breakout

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S135

In the ignition control module harness, approx 26.5 cm (10.4 in) from the ignition control module

Harness Routing Views in Wiring Systems

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S136

In the ignition control module harness, approx 20 cm (7.9 in) from the ignition control module

Harness Routing Views in Wiring Systems

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S203

In the body harness, approx 6 cm (2.4 in) from the P500 pass-through breakout

Harness Routing Views in Wiring Systems

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S401

In the body harness, approx 80 cm (31.5 in) from the C305 connector

Harness Routing Views in Wiring Systems

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