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

Steering column harness at base of column

Harness Routing Views in Wiring Systems

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C213

IP harness behind LH side of IP near center of vehicle

Harness Routing Views in Wiring Systems

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G103 (4.3L, 6.5L)

Engine harness, at generator bracket

Power and Grounding Component Views in Wiring Systems

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G103 (5.0L, 5.7L, 7.4L)

LH front of Engine harness, near A/C compressor

Power and Grounding Component Views in Wiring Systems

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P101

RH side of IP

Power and Grounding Component Views in Wiring Systems

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S101 (6.5L)

Engine harness, approx 22 cm (8 in) from optical fuel temperature sensor breakout toward C100 breakout

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S103 (4.3L)

Engine harness, approx 4 cm (2 in) from fuel injector breakout toward transmission

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S103 (5.0L, 5.7L)

Engine harness approx 4 cm (2 in) from oxygen sensor breakout toward fuel injector breakout

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S103 (7.4L)

Engine harness, approx 4 cm (2 in) from ECT sensor breakout toward C100

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S127 (4.3L, 7,4L)

Engine harness, approx 65 cm (26 in) from underhood fuse-relay center toward ECT sensor breakout

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S127 (5.0L, 5.7L)

Engine harness, approx 11 cm (4 in) from C100 breakout toward ECT sensor breakout

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S127 (6.5L)

Engine harness, approx 19 cm (8 in) from C100 breakout toward generator breakout

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S152 (4.3L)

Engine harness 16 cm (6 in) from fuel injector breakout toward G103 breakout

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S152 (5.0L, 5.7L)

Engine harness 4 cm (2 in) from fuel injector breakout towards G103 breakout

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