GM Service Manual Online
For 1990-2009 cars only

Name

Location

Locator View

Connector End View

Horn Contact

On the center of the steering wheel, part of the steering wheel horn cap

Horn Component Views

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Horn Relay

In the mini-relay center, position B

Horn Component Views

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Horn Switch

On the center of the steering wheel, part of the steering wheel horn cap

Horn Component Views

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Horn Slip Ring (Contact)

On the center of the steering wheel, part of the steering wheel horn cap

Horn Component Views

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Horn, A-Note (High)

Behind the front bumper, on the front right side of the crossmember

Horn Component Views

Horn Connector End Views

Horn, F-Note (Low)

Behind the front bumper, on the front left side of the crossmember

Horn Component Views

Horn Connector End Views

IP Fuse Block

In the center of the IP, to the left of the instrument panel cluster (IPC)

Power and Grounding Component Views in Wiring Systems

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MaxiFuse® Block/ Mini-Relay Center

On the right side of the IP, under the access cover

Power and Grounding Component Views in Wiring Systems

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MaxiFuse® Block 1

On the right side of the IP, under the access cover, on the left side of the MaxiFuse® block/ mini-relay center

Power and Grounding Component Views in Wiring Systems

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MaxiFuse® Block 2

On the right side of the IP, under the access cover, on the center of the MaxiFuse® block/ mini-relay center

Power and Grounding Component Views in Wiring Systems

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Mini-Relay Center

On the right side of the IP, under the access cover, on the right side of the MaxiFuse® block/ mini-relay center

Power and Grounding Component Views in Wiring Systems

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Turn Signal Switch

On the left side of the steering wheel (contains the turn signal switch and the headlamps dimmer switch)

Lighting Systems Component Views in Lighting Systems

Lighting Systems Connector End Views in Lighting Systems

C200 (56 cavities)

In the IP harness, to the engine harness, under the right side of the IP

Power and Grounding Component Views in Wiring Systems

Inline Harness Connector End Views in Wiring Systems

C200 (56 cavities) (Cat® Diesel)

In the IP harness, to the engine harness, under the right side of the IP

Power and Grounding Component Views in Wiring Systems

Inline Harness Connector End Views in Wiring Systems

C200 (56 cavities) (GM Diesel)

In the IP harness, to the engine harness, under the right side of the IP

Power and Grounding Component Views in Wiring Systems

Inline Harness Connector End Views in Wiring Systems

G102

From the engine harness, to the back of the left cylinder head

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G102 (Cat® Diesel)

From the engine harness, to the lower right front side of the engine

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G102 (GM Diesel)

From the engine harness, to the right side of the top front of the engine

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G208

From the IP harness, on the top left side of the steering column

Power and Grounding Component Views in Wiring Systems

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P100

On the right side of the bulkhead

Power and Grounding Component Views in Wiring Systems

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S124

In the engine harness, approximately 5 cm (2.0 in) from the horns breakout

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S124 (Cat® Diesel)

In the engine harness, approximately 49 cm (19.3 in) back from the horns breakout

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S124 (GM Diesel)

In the engine harness, approximately 13 cm (5.1 in) to the rear of the generator harness from the breakout

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S138

In the engine harness, approximately 4 cm (1.6 in) from the generator harness breakout

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S138 (Cat® Diesel)

In the engine harness, approximately 11 cm (4.3 in) from the main harness, toward the forward lamps harness connector

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S138 (GM Diesel)

In the engine harness, approximately 20 cm (7.9 in) toward the forward lamps harness connector from the fuel tank harness

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S142

In the engine harness, approximately 4 cm (1.6 in) from the throttle position (TP) sensor, toward the breakout

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S142 (Cat® Diesel)

In the engine harness, approximately 4 cm (1.6 in)

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S142 (GM Diesel)

In the engine harness, approximately 11 cm (4.3 in) from the power brake booster pump motor breakout, toward the brake fluid switches

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S203

In the IP harness, approximately 4 cm (1.6 in) from the IP fuse block breakout

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S203 (Cat® Diesel)

In the IP harness, approximately 4 cm (1.6 in) from the IP fuse block breakout

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S203 (GM Diesel)

In the IP harness, approximately 22 cm (8.7 in) to the right of the data link connector (DLC) breakout

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S221

In the IP harness, approximately 12 cm (4.7 in) to the right of the data link connector (DLC) breakout

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