GM Service Manual Online
For 1990-2009 cars only

Name

Location

Locator View

Connector End View

Brake Pedal Position (BPP) Switch

Above the brake pedal

Lighting Systems Component Views in Lighting Systems

Lighting Systems Connector End Views in Lighting Systems

Brake Pressure Warning Switch

On the brake pressure modulator valve assembly

Hydraulic Brake Component Views in Hydraulic Brakes

Hydraulic Brake Connector End Views in Hydraulic Brakes

Data Link Connector (DLC)

On the lower left side of the dash

Harness Routing Views in Wiring Systems

Data Link Communications Connector End Views in Data Link Communications

Electronic Brake Control Module (EBCM)

On the left front side of the frame to the left of the transmission

Harness Routing Views in Wiring Systems

Antilock Brake System Connector End Views

Instrument Cluster

On the left side of the dash

HVAC Component Views in HVAC Systems - Manual

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

Instrument Panel (IP) Fuse Block

On the lower left side of the dash, next to the left side kick panel

Harness Routing Views in Wiring Systems

Electrical Center Identification Views in Wiring Systems

Radio

In the center of the dash

HVAC Component Views in HVAC Systems - Manual

Entertainment Connector End Views in Entertainment

Underhood Fuse Block (A4WD)

On the left side of the dash, near the battery

Harness Routing Views in Wiring Systems

Electrical Center Identification Views in Wiring Systems

Underhood Fuse Block (RWD)

On the left side of the dash, near the battery

Harness Routing Views in Wiring Systems

Electrical Center Identification Views in Wiring Systems

Vehicle Control Module (VCM)

On the left side of the engine compartment on the lower side of the battery

Engine Controls Component Views in Engine Controls - 4.3L

VCM Connector End Views in Engine Controls - 4.3L

Vehicle Speed Sensor (VSS)

In the rear of the transmission

Harness Routing Views in Wiring Systems

Engine Controls Connector End Views in Engine Controls - 4.3L

Vehicle Speed Sensor Shield

From the VCM to the VSS sensor harness (wrapped around the harness)

Harness Routing Views in Wiring Systems

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Wheel Speed Sensor LH

Lower left control arm

Antilock Brake System Component Views

Antilock Brake System Connector End Views

Wheel Speed Sensor RH

Lower right control arm

Antilock Brake System Component Views

Antilock Brake System Connector End Views

C100

In the left side front of the dash

Harness Routing Views in Wiring Systems

Inline Harness Connector End Views in Wiring Systems

C104

In the engine harness 15 cm (5.9 in) from fuse block relay breakout toward C100

Harness Routing Views in Wiring Systems

Inline Harness Connector End Views in Wiring Systems

C314 (A4WD)

In the wheel speed sensor harness 100 cm (39.4 in) from the LH wheel speed sensor breakout

Harness Routing Views in Wiring Systems

Inline Harness Connector End Views in Wiring Systems

C314 (RWD)

In the wheel speed sensor harness 72 cm (28.3 in) from the LH wheel speed sensor breakout.

Harness Routing Views in Wiring Systems

Inline Harness Connector End Views in Wiring Systems

G101

In the left front radiator support below the main body ground

Power and Grounding Component Views in Wiring Systems

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G106

In the left rear of the engine block next to the knock sensor

Harness Routing Views in Wiring Systems

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S104

In the forward lamp harness 17 cm (6.7 in) from the left park/turn lamp breakout

Harness Routing Views in Wiring Systems

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S110

In the engine harness 24 cm (9.4 in) from the underhood fuse block breakout.

Harness Routing Views in Wiring Systems

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S112

In the Engine Harness 10 cm (3.9  in) from forward lamps breakout toward C100

Harness Routing Views in Wiring Systems

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S114

In the engine harness 4 cm (1.6 in) from the underhood fuse block breakout

Harness Routing Views in Wiring Systems

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S127

In the engine harness 11 cm (4.3 in) from the park/neutral position and the backup lamp switch breakout toward the rear vehicle

Harness Routing Views in Wiring Systems

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S260

In the IP harness 49 cm (19.3 in) from the right kick panel connector C205

Harness Routing Views in Wiring Systems

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S333

In the engine harness 15 cm (5.9 in) from the vehicle speed sensor

Harness Routing Views in Wiring Systems

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Splice Pack #261 (SP261)

In the IP harness 20 cm (7.9 in) from relay blocks breadout toward the DLC

Harness Routing Views in Wiring Systems

Data Link Communications Connector End Views in Data Link Communications