GM Service Manual Online
For 1990-2009 cars only

Name

Location

Locator View

Connector End View

Brake Pressure Differential Switch

At the center of the combination valve on the LH side of the ABS unit

Antilock Brake System Component Views

Antilock Brake System Connector End Views

Data Link Connector (DLC)

On the cowl, under the steering column near the floor

Data Link Communications Component Views in Data Link Communications

Data Link Communications Connector End Views in Data Link Communications

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 IP wiring harness junction block

Hydraulic Brake Component Views in Hydraulic Brakes

Hydraulic Brake Connector End Views in Hydraulic Brakes

Electronic Brake Control Module (EBCM)

On the front crossmember in front of the radiator

Antilock Brake System Component Views

Antilock Brake System Connector End Views

Engine Wiring Harness Junction Block (Underhood Fuse Relay Center)

At the lower LH corner of the cowl

Power and Grounding Component Views in Wiring Systems

Power and Grounding Connector End Views in Wiring Systems

Fuse Block

Body builder installed

Electrical Center Identification Viewsin 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 in Instrument Panel, Gauges and Console

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 LH side of the steering column support

Engine Controls Component Views in Engine Controls

Engine Controls Connector End Views in Engine Controls

Stoplamps Switch

On the brake pedal linkage

Lighting Systems Component Views in Lighting Systems

Lighting Systems Connector End Views in Lighting Systems

Wheel Speed Sensor (WSS), LH Front

Mounted in the left front brake backing plate

Antilock Brake System Component Views

Antilock Brake System Connector End Views

Wheel Speed Sensor (WSS), RH Front

Mounted in the right front brake backing plate

Antilock Brake System Component Views

Antilock Brake System Connector End Views

C101

On the engine side of the bulkhead, near C100

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

G101

The ABS pump motor ground to the right frame rail near the right front corner of the vehicle

Power and Grounding Component Views in Wiring Systems

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G104

Rear of RH cylinder bank

Power and Grounding Component Views in Wiring Systems

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P100

Main wiring pass-through at the lower left corner of the bulkhead

Harness Routing Views in Wiring Systems

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S101

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

Harness Routing Views in Wiring Systems

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S114

In the main engine harness, about 7 cm (3 in) from the breakout for the ABS system toward the breakout for the LH wheel speed sensor

Harness Routing Views in Wiring Systems

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S117

In the engine harness branch leading to the ABS system, about 7 cm (3 in) from the main engine harness

Harness Routing Views in Wiring Systems

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S118

In the engine harness branch leading to the ABS system, about 13 cm (5 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, about 7 cm (3 in) from the breakout for the RH wheel speed sensor

Harness Routing Views in Wiring Systems

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S208

In the IP harness, about 4 cm (2 in) toward the stoplamp switch breakout from the transmission range control breakout

Harness Routing Views in Wiring Systems

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S221

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

Harness Routing Views in Wiring Systems

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S224

In the IP harness stoplamp switch breakout, about 24 cm (9 in) from the main harness

Harness Routing Views in Wiring Systems

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S235

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

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