GM Service Manual Online
For 1990-2009 cars only

Name

Location

Locator View

Connector End View

IP Fuse Block

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

Power and Grounding Component Views

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Speedo Adapter

Under the right side of IP

Instrument Panel, Gages, and Console Component Views

Engine Electrical Connector End Views

Two-Speed Rear Axle Air Shift Switch (Air-Operated Shift System)

On the left frame rail, forward of the rear axle, on the two-speed rear axle quick-release valve

Rear Axle Component Views

Rear Axle Connector End Views

Two-Speed Rear Axle Shift Switch (Electric-Operated Shift System)

At the manual transmission shift lever

Rear Axle Component Views

Rear Axle Connector End Views

C117 (3 cavities) (Gasoline and Cat® Diesel)

In the engine harness, to the two-speed rear axle jumper harness, near the frame rail, by the starter

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Inline Harness Connector End Views

C200 (56 cavities) (Cat® Diesel)

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

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Inline Harness Connector End Views

C200 (56 cavities) (Gasoline)

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

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Inline Harness Connector End Views

C404 (3 cavities) (Electric-Operated Shift System)

In two-speed rear axle jumper harness, to the two-speed rear axle harness

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Inline Harness Connector End Views

C409 (8 cavities) (Cat® Diesel)

In the engine harness, to the transmission harness, on the left side of the engine, at the bellhousing

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Inline Harness Connector End Views

C409 (8 cavities) (Gasoline)

In the engine harness, to the transmission harness, on the left side of the engine, at the bellhousing

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Inline Harness Connector End Views

G101 (Cat® Diesel)

From the starter motor end ground stud (G101) to the right frame rail ground (G100)

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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 (Gasoline)

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

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P100

On the right side of the bulkhead

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S126 (Gasoline and Electric-Operated Shift System

In the engine harness, approximately 21 cm (8.3 in) from the engine oil pressure (EOP) gauge sensor and fuel pump switch breakout, toward the bulkhead

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S126 (Cat® Diesel and Electric-Operated Shift System)

26 cm (10.4 in) from the either injection engine coolant temperature (ECT) switch breakout, toward the bulkhead

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S142 (Gasoline)

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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S418 (Two-Speed Rear Axle)

In the two-speed rear axle harness, approximately 65 cm (25.6 in) forward of the two-speed rear axle shift relay breakout

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