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 in Antilock Brake System

Antilock Brake System Connector End Views in Antilock Brake System

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 wiring harness forward of the ignition switch connector along the LH steering column support

Hydraulic Brake Component Views

Hydraulic Brake 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 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 in Instrument Panel, Gauges and Console

Park Brake Actuator Position Switch

On the rear of the park brake actuator assembly

Park Brake System Component Views in Park Brake

Park Brake System Connector End Views in Park Brake

Park Brake Alarm Relay

In the engine wiring harness junction block (underhood fuse relay center) at the LH corner of the cowl

Power and Grounding Component Views in Wiring Systems

Power and Grounding Connector End Views in Wiring Systems

Park Brake Pull Button Switch

To the left of the transmission range selector

Park Brake System Component Views in Park Brake

Park Brake System Connector End Views in Park Brake

Park Brake Pull Button Switch Relay

In the instrument panel (IP) wiring harness junction block

Power and Grounding Component Views in Wiring Systems

Power and Grounding Connector End Views in Wiring Systems

Power Brake (P/B) Booster Fluid Flow Switch

At the top of the power brake booster pump housing, between the pump and the master cylinder

Hydraulic Brake Component Views

Hydraulic Brake Connector End Views

Power Brake Booster Pump

In the engine compartment, on the lower right side of the bulkhead, at the brake master cylinder

Hydraulic Brake Component Views

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Power Brake Booster Pump Relay

On a relay bracket by the engine wiring harness junction block (underhood fuse relay center)

Hydraulic Brake Component Views

Hydraulic Brake Connector End Views

Stoplamp Switch

On the brake pedal linkage

Lighting Systems Component Views in Lighting Systems

Lighting Systems Connector End Views in Lighting Systems

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

C111

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

G104

Rear of the RH cylinder bank

Power and Grounding Component Views in Wiring Systems

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G200

IP harness ground, 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

On the IP harness, at the lower left corner of the bulkhead, to harness connectors in the engine area

Harness Routing Views in Wiring Systems

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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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S111

In the engine harness, 13 cm (5 in) from the breakout for the PCM toward the breakout for the generator

Harness Routing Views in Wiring Systems

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S117

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

Harness Routing Views in Wiring Systems

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S122

In the engine harness, approximately 7 cm (3 in) from the breakout to the engine wiring harness junction block

Harness Routing Views in Wiring Systems

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S200

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

Harness Routing Views in Wiring Systems

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S201

In the IP harness, 11 cm (4 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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S203

In the IP harness, 8 cm (3 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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S205

In the IP harness, 4 cm (2 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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S207

In the IP harness, 3 cm (1 in) toward the stoplamp switch breakout from the transmission controller breakout

Harness Routing Views in Wiring Systems

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S208

In the IP harness, approximately 4 cm (2 in) toward the stoplamp switch breakout from the transmission controller breakout

Harness Routing Views in Wiring Systems

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S212

In the IP harness, on the breakout to the transmission range control, 11 cm (4 in) from the main harness

Harness Routing Views in Wiring Systems

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S213

In the IP harness, on the breakout to the transmission range control, 5 cm (2 in) from the main harness

Harness Routing Views in Wiring Systems

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S216

In the IP harness, on the breakout to the steering column connector, 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, approximately 5 cm (2 in) toward the IP fuse block from the stoplamp switch breakout

Harness Routing Views in Wiring Systems

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S223

In the IP harness stoplamp switch breakout, approximately 30 cm (12 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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S401

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

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