GM Service Manual Online
For 1990-2009 cars only

Name

Location

Locator View

Connector End View

Automatic Transfer Case (ATC) Control Module

To the left of the instrument cluster behind the headlamp switch

Transfer Case Control Component Views in Automatic Transfer Case

Transfer Case Control Connector End Views in Automatic Transfer Case

Automatic Transfer Case (ATC) Select Switch

To the left of the instrument cluster above the headlamp switch on the IP

Transfer Case Control Component Views in Automatic Transfer Case

Transfer Case Control Connector End Views in Automatic Transfer Case

Body Wiring Harness Junction Block

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

Power and Grounding Component Views in Wiring Systems

Power and Grounding Connector End Views in Wiring Systems

Brake Fluid Level Switch

On the left side of the brake fluid reservoir

Hydraulic Brake Component Views in Hydraulic Brakes

Hydraulic Brake Connector End Views in Hydraulic Brakes

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

Electronic Brake Control Module (EBCM)

On the left side of the inner frame

Antilock Brake System Component Views in Antilock Brake System

Antilock Brake System Connector End Views in Antilock Brake System

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

Front Axle Actuator/Switch

On the axle housing on the right side of the center

Transfer Case Control Component Views in Automatic Transfer Case

Transfer Case Control Connector End Views in Automatic Transfer Case

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) / Vehicle Control Module (VCM)

Near the left front inside the engine compartment

Engine Controls Component Views in Engine Controls - 4.3L

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

Engine Controls Connector End Views in Engine Controls - 4.3L

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

Stop Lamp Switch

At the top of the brake peddle

Lighting Systems Component Views in Lighting Systems

Lighting Systems Connector End Views in Lighting Systems

Traction Assist Switch

Located on the left side of the IP

Lighting Systems Component Views in Lighting Systems

Suspension Controls Connector End Views in Suspension Systems

Vehicle Speed Sensor (VSS) Adapter (4WD Only)

On the left side of the transfer case

Engine Controls Component Views in Engine Controls - 4.3L

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

Engine Controls Connector End Views in Engine Controls - 4.3L

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

Vehicle Speed Sensor (VSS)

In the extension housing on the left side of the transmission

Engine Controls Component Views in Engine Controls - 4.3L

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

Engine Controls Connector End Views in Engine Controls - 4.3L

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

Wheel Speed Sensor, LH

On the LH hub and bearing assembly

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Antilock Brake System Connector End Views in Antilock Brake Systems

Wheel Speed Sensor, RH

On the right hub and bearing assembly

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Antilock Brake System Connector End Views in Antilock Brake Systems

C100

Under the Engine Wiring Junction Block

Harness Routing Views in Wiring Systems

Inline Harness Connector End Views in Wiring Systems

C102

Under the Engine Wiring Harness Junction Block

Harness Routing Views in Wiring Systems

Inline Harness Connector End Views in Wiring Systems

C150

On the left inner fender inside the engine compartment

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Inline Harness Connector End Views in Wiring Systems

C151

On the left inner fender near the Engine Wiring Harness Junction Block

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Inline Harness Connector End Views in Wiring Systems

C152

On the left inner fender under the Engine Wiring Harness Junction Block

Harness Routing Views in Wiring Systems

Inline Harness Connector End Views in Wiring Systems

C152A

On the left inner fender under the Engine Wiring Harness Junction Block

Harness Routing Views in Wiring Systems

Inline Harness Connector End Views in Wiring Systems

C153

On the left inner fender near the Engine Wiring Harness Junction Block

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Inline Harness Connector End Views in Wiring Systems

C202

On the left side of the IP on the back of the cluster

Harness Routing Views in Wiring Systems

Inline Harness Connector End Views in Wiring Systems

G102

On the right front of the engine block (4.3L)

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G102

On the left front of the engine block (4.8L, 5.3L, 6.0L)

Power and Grounding Component Views in Wiring Systems

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G110

On the left front body mount behind the left front wheel housing

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 203 (SP203)

On the top left side of the IP near the A pillar

Harness Routing 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

S102

In the engine harness

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S202

In the chassis harness

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