GM Service Manual Online
For 1990-2009 cars only

Name

Location

Locator View

Connector End View

Horn Relay

In the underhood fuse-relay center, in the left front of the engine compartment

Power and Grounding Component Views in Wiring Systems

Power and Grounding Connector End Views in Wiring Systems

Horn Switch

On the center of the steering column/pad.

Horn Component Views

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Horn(s)

At the left front of the vehicle

Horn Component Views

Horn Connector End Views

C200

At the steering column harness, at the base of the column

Harness Routing Views in Wiring Systems

Inline Harness Connector End Views in Wiring Systems

C213

At the IP harness, behind the LH side of the IP near the center of the vehicle

Harness Routing Views in Wiring Systems

Inline Harness Connector End Views in Wiring Systems

G103 (4.3L)

At the engine harness, at the generator bracket

Power and Grounding Component Views in Wiring Systems

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G103 (5.0L, 5.7L, 7.4L)

LH front of the engine harness, near the A/C compressor

Power and Grounding Component Views in Wiring Systems

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G103 (6.5L)

At the engine harness, at the generator bracket

Power and Grounding Component Views in Wiring Systems

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P101

Under the RH side of the IP

Harness Routing Views in Wiring Systems

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S101 (6.5L)

At the engine harness, approx 22 cm (8.7 in) from the optical fuel temperature sensor breakout toward the C100 breakout

Harness Routing Views in Wiring Systems

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S103 (4.3L)

At the engine harness, approx 4 cm (1.6 in) from the fuel injector breakout, toward the transmission

Harness Routing Views in Wiring Systems

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S103 (5.0L, 5.7L)

At the engine harness, approx 4 cm (1.6 in) from the oxygen sensor breakout, toward the fuel injector breakout

Harness Routing Views in Wiring Systems

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S103 (7.4L)

At the engine harness, approx 4 cm (1.6 in) from the ECT sensor breakout, toward C100

Harness Routing Views in Wiring Systems

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S127 (4.3L, 7.4L)

At the engine harness, approx 65 cm (25.6 in) from the underhood fuse-relay center, toward the ECT sensor breakout

Harness Routing Views in Wiring Systems

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S127 (5.0L, 5.7L)

At the engine harness, approx 11 cm (4.3 in) from the C100 breakout, toward the ECT sensor breakout

Harness Routing Views in Wiring Systems

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S127 (6.5L)

At the engine harness, approx 19 cm (7.5 in) from the C100 breakout, toward the generator breakout

Harness Routing Views in Wiring Systems

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S152 (4.3L)

At the engine harness, 16 cm (6.3 in) from the fuel injector breakout, toward the G103 breakout

Harness Routing Views in Wiring Systems

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S152 (5.0L, 5.7L)

At the engine harness, 4 cm (1.6 in) from the fuel injector breakout towards the G103 breakout

Harness Routing Views in Wiring Systems

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