GM Service Manual Online
For 1990-2009 cars only

Name

Location

Locator View

Connector End View

Daytime Running Lamps (DRL) Control Module

Taped to the wiring harness, above the IP wiring harness junction block

Lighting Systems Component Views in Lighting Systems

Lighting Systems Connector End Views in Lighting Systems

Diode Network

Taped to the IP harness, near the left side of the steering column support

Hydraulic Brake Component Views in Hydraulic Brakes

Hydraulic Brake Connector End Views in Hydraulic Brakes

Engine Coolant Temperature (ECT) Sensor

On the RH side of the engine, near the center, above the spark plugs

Engine Controls Component Views in Engine Controls

Engine Controls Connector End Views in Engine Controls

Engine Coolant Level Switch

On the right side of the coolant surge tank, above the radiator

Engine Controls Component Views in Engine Controls

Engine Controls Connector End Views in Engine Controls

Engine Oil Pressure Sensor

At the rear of the engine between the block and the bell housing

Engine Controls Component Views in Engine Controls

Engine Controls Connector End Views in Engine Controls

Fuel Pump Module

On top of the fuel tank

Engine Controls Component Views in Engine Controls

Engine Controls Connector End Views in Engine Controls

Fuse Block

Body builder installed

Electrical Center Identification Views in Wiring Systems

Power and Grounding Connector End Views in Wiring Systems

Ignition Switch

On the right side of the steering column

Power and Grounding Component Views in Wiring Systems

Power and Grounding Connector End Views in Wiring Systems

Instrument Cluster

Body builder installed

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Instrument Panel, Gages, and Console Connector End Views

IP Wiring Harness Junction Block

At the lower left corner of the cowl on the IP side

Power and Grounding Component Views in Wiring Systems

Power and Grounding Connector End Views in Wiring Systems

Powertrain Control Module (PCM)

Above the radiator, to the right of the driver island

Engine Controls Component Views in Engine Controls

Powertrain Control Module Connector End Views in Engine Controls

Speedometer Adapter Module

On the left side of the steering column support

Engine Controls Component Views in Engine Controls

Engine Controls Connector End Views in Engine Controls

C100

At the lower left corner of the bulkhead; the IP harness end is attached to the bulkhead

Harness Routing Views in Wiring Systems

Inline Harness Connector End Views in Wiring Systems

C101

On the engine side of the bulkhead, near C100

Harness Routing Views in Wiring Systems

Inline Harness Connector End Views in Wiring Systems

C110

On top of the transmission

Harness Routing Views in Wiring Systems

Inline Harness Connector End Views in Wiring Systems

C202

On top of the steering column support

Harness Routing Views in Wiring Systems

Inline Harness Connector End Views in Wiring Systems

C203

On top of the steering column support

Harness Routing Views in Wiring Systems

Inline Harness Connector End Views in Wiring Systems

G102

On the front center of the engine, at the thermostat housing

Power and Grounding Component Views in Wiring Systems

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G104

Rear of the RH cylinder bank

Power and Grounding Component Views in Wiring Systems

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G200

On top of the steering column support

Power and Grounding Component Views in Wiring Systems

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G400

Rear chassis harness components ground, on the right frame rail near the park brake pump

Power and Grounding Component Views in Wiring Systems

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P100

Lower left corner of the bulkhead

Harness Routing Views in Wiring Systems

S101

In the engine harness, 20 cm (8 in) from the generator breakout toward the fuel injector breakout

Harness Routing Views in Wiring Systems

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S102

In the engine harness, 27 cm (11 in) from the fuel injector breakout toward the generator breakout

Harness Routing Views in Wiring Systems

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S110

In the breakout for the PCM connectors, 10 cm (4 in) from the main engine harness

Harness Routing Views in Wiring Systems

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S119

In the engine harness branch leading to the ABS system, 7 cm (3 in) from the breakout for the RH wheel speed sensor

Harness Routing Views in Wiring Systems

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S200

In the IP harness, approximately 7 cm (3 in) toward the IP wiring harness junction block from the steering column harness breakout

Harness Routing Views in Wiring Systems

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S202

In the IP harness, 16 cm (6 in) toward the IP wiring harness junction block from the breakout for the transmission range control

Harness Routing Views in Wiring Systems

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S210

In the IP harness, 5 cm (2 in) toward the stoplamp switch breakout from the transmission range control breakout

Harness Routing Views in Wiring Systems

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S216

In the IP harness, on the steering column breakout, approximately 14 cm (6 in) from the main harness

Harness Routing Views in Wiring Systems

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S221

In the IP harness, 9 cm (3 in) toward the speedometer adapter module from the transmission range control breakout

Harness Routing Views in Wiring Systems

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S222

In the IP harness, 5 cm (2 in) toward the fuse block from the stoplamp switch breakout

Harness Routing Views in Wiring Systems

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S226

In the IP harness, approximately 6 cm (2 in) toward the IP fuse block from the stoplamp switch breakout

Harness Routing Views in Wiring Systems

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S234

In the IP extension harness, 19 cm (7 in) from the instrument cluster connector

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S235

In the IP extension harness, 12 cm (5 in) from the instrument cluster connector

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S401

In the rear chassis harness, 100 cm (39 in) foward of the breakout for the fuel pump

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