GM Service Manual Online
For 1990-2009 cars only

Name

Location

Locator View

Connector End View

Body Wiring Harness Junction Block

Under the left side of the instrument panel near the left kick panel

Harness Routing Views in Wiring Systems

Power and Grounding Connector End Views in Wiring Systems

Data Link Connector (DLC)

On the left lower dash below the steering column

Data Link Communications Component Views in Data Link Communications

Data Link Communications Connector End Views in Data Link Communications

Engine Coolant Level Switch Connector

In the coolant reservoir

Instrument Panel, Gages, and Console Component Views in Instrument Panel, Gauges and Console

Instrument Panel, Gages, and Console Connector End Views in Instrument Panel, Gauges and Console

Engine Coolant Temperature (ECT) Sensor

Near the front of the left cylinder head in front of the exhaust manifold

Engine Controls Component Views in Engine Controls-4.8L, 5.3L, and 6.0L

Engine Controls Connector End Views in Engine Controls-4.8L, 5.3L, and 6.0L

Engine Wiring Harness Junction Block

At the left side of the engine compartment near the battery

Power and Grounding Component Views in Wiring Systems

Power and Grounding Connector End Views in Wiring Systems

Fuse Block

On the lower left side of the IP

Power and Grounding Component Views in Wiring Systems

Power and Grounding Connector End Views in Wiring Systems

Instrument Cluster

On the left side of the IP above the steering column

Instrument Panel, Gages, and Console Component Views in Instrument Panel, Gauges and Console

Instrument Panel, Gages, and Console Connector End Views in Instrument Panel, Gauges and Console

Powertrain Control Module (PCM)

Near the left front inside the engine compartment

Engine Controls Component Views in Engine Controls-4.8L, 5.3L, and 6.0L

Engine Controls Connector End Views in Engine Controls-4.8L, 5.3L, and 6.0L

Vehicle Control Module (VCM)

On the left front of the engine compartment

Engine Controls Component Views in Engine Controls - 4.3L

VCM Connector End Views in Engine Controls - 4.3L

C100

Under the Engine Wiring Harness Junction Block

Harness Routing Views in Wiring Systems

Inline Harness Connector End Views in Wiring Systems

G103

On the right rear of the engine block

Power and Grounding Component Views in Wiring Systems

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G104

On the left rear of the engine cylinder head

Power and Grounding Component Views in Wiring Systems

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P100

At the left rear of the engine compartment in the front of the dash

Power and Grounding Component Views in Wiring Systems

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Splice Pack 205 (SP205)

On the left side of the IP behind the headlamp switch

Data Link Communications Component Views in Data Link Communications

Data Link Communications Connector End Views in Data Link Communications

S104

In the engine harness

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S107

In the engine harness (4.3L)

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