GM Service Manual Online
For 1990-2009 cars only

Name

Location

Locator View

Connector End View

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

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

Park Brake System Connector End Views

Park Brake Alarm

Body builder installed

 

Park Brake System Connector End Views

Park Brake Alarm Relay

In the 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

Park Brake Pressure Indicator Switch

On the park brake pump assembly

Park Brake System Component Views

Park Brake System Connector End Views

Park Brake Pressure Valve Solenoid

On the park brake pump assembly

Park Brake System Component Views

Park Brake System Connector End Views

Park Brake Pull Button Switch

To the left of the transmission range selector

Park Brake System Component Views

Park Brake System Connector End Views

Park Brake Pump Motor

On the park brake pump

Park Brake System Component Views

Park Brake System Connector End Views

Park Brake Pump Motor Relay

Attached to the park brake pump mounting near the RH frame rail

Park Brake System Component Views

Park Brake System Connector End Views

Park Brake Pump Motor Switch

On the park brake pump assembly

Park Brake System Component Views

Park Brake System Connector End Views

Transmission Range (TR) Shift Control

On the IP, to the right of the steering column

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

C112

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

C300

On the RH frame rail about a foot to the rear of the park brake pump

Harness Routing Views in Wiring Systems

Inline Harness Connector End Views in Wiring Systems

C301

On the RH frame rail about a foot to the rear of the park brake pump

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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G300

Auto apply park brake components ground, on the right frame rail near the park brake pump

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

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

Harness Routing Views in Wiring Systems

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R200

In the park brake alarm connector

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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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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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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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S202

In the IP harness, 16 cm (6 in) toward the IP wiring harness junction block from the breakout from 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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S212

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

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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S302

In the autopark harness, 14 cm (6 in) from connectors C300 and C301

Harness Routing Views in Wiring Systems

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S303

In the autopark harness, 33 cm (13 in) from connectors C300 and C301

Harness Routing Views in Wiring Systems

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S304

In the autopark harness, 37 cm (14 in) from connectors C300 and C301

Harness Routing Views in Wiring Systems

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S305

In the autopark harness, 41 cm (16 in) from connectors C300 and C301

Harness Routing Views in Wiring Systems

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S306 / S307 (Diode Splice)

In the autopark harness, 18 cm (7 in) from connectors C300 and C301

Harness Routing Views in Wiring Systems

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S308 / S309 (Diode Splice)

In the autopark harness, 23 cm (9 in) from connectors C300 and C301

Harness Routing Views in Wiring Systems

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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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