GM Service Manual Online
For 1990-2009 cars only

Name

Location

Locator View

Connector End View

Automatic Level Control Sensor

Attached to the RH side of the rear differential

Automatic Level Control Component Views Automatic Level Control

Automatic Level Control Connector End Views in Automatic Level Control

Brake Fluid Minimum Capacity Sensor

Part of the brake master cylinder reservoir cap

Wiper/Washer Component Views in Wiper/Washer System

Hydraulic Brake Connector End Views in Hydraulic Brakes

Body Control Module (BCM)

Mounted on the RH A-pillar, behind the trim panel

Body Control System Component Views in Body Control System

Body Control System Connector End Views in Body Control System

Cooling Fluid Minimum Capacity Sensor

Inside the engine coolant overflow 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

Data Link Connector (DLC)

Attached to the I/P carrier, to the left of the steering column

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Data Link Communications Connector End Views in Data Link Communications

Electronic Brake/Traction Control Module (EBTCM)

LH front of the engine compartment, mounted to the lower rail

Antilock Brake System Component Views in Antilock Brakes

Antilock Brake System Connector End Views in Antilock Brakes

Engine Control Module (ECM)

LH front of the engine compartment, in the ECM housing

Engine Controls Component Views in Engine Controls

Engine Controls Connector End Views in Engine Controls

Engine Coolant Temperature Gauge Sensor

Mounted in the coolant bridge

Engine Controls Component Views in Engine Controls

Engine Controls Connector End Views in Engine Controls

Engine Oil Level Sensor

Lower RH front of the engine block

Engine Electrical Component Views in Engine Electrical

Engine Controls Connector End Views in Engine Controls

Engine Oil Pressure Gauge Switch

Lower RH front of the engine block

Engine Electrical Component Views in Engine Electrical

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Front Disc Brake Pad Wear Sensor (LH)

Attached to the LH front brake caliper

Instrument Panel, Gages, and Console Component Views

Instrument Panel, Gages, and Console Connector End Views

Front Disc Brake Pad Wear Sensor (RH)

Attached to the RH front brake caliper

Instrument Panel, Gages, and Console Component Views

Instrument Panel, Gages, and Console Connector End Views

Fuel Sender

Underneath the rear of the vehicle, inside of the fuel tank

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Engine Controls Connector End Views in Engine Controls

Fuse Block

Mounted to the I/P, lower LH side of the steering column

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Gauge Cluster

LH side of the I/P, just to the left and above the heater and A/C control

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Instrument Panel, Gages, and Console Connector End Views

Generator

Attached to the RH lower front of the engine block

Engine Electrical Component Views in Engine Electrical

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Hazard Warning Switch

Center of the I/P, to the left of the heater and A/C control

Instrument Panel, Gages, and Console Component Views

Lighting Systems Connector End Views in Lighting Systems

Headlamp Switch

LH side of the I/P

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Lighting Systems Connector End Views in Lighting Systems

Instrument Cluster

LH side of the I/P, above the steering column

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Instrument Panel, Gages, and Console Connector End Views

Inflatable Restraint Sensing and Diagnostic and Seat Belt Pretensioner Module

Under the center console, near the parking brake lever

Instrument Panel, Gages, and Console Component Views

SIR Connector End Views in SIR

Multifunction Relay K134

Under the LH side of the I/P

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Lighting Systems Connector End Views in Lighting Systems

Park Brake Indicator Switch

Attached to the park brake lever, in the center console

Instrument Panel, Gages, and Console Component Views

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Rear Compartment Courtesy Lamp Switch

Attached to the rear compartment lid

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Seat Belt Switch

Part of the driver's seat belt buckle

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Transmission Control Module (TCM)

Behind the RH side of the I/P

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Automatic Transmission Inline Harness Connector End View in Automatic Transmission

Turn Signal Switch

Attached to the LH side of the steering column

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Lighting Systems Connector End Views in Lighting Systems

Windshield Washer Solvent Level Switch

Behind the front bumper, in the windshield washer solvent reservoir

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Wiper/Washer Connector End Views in Wiper/Washer System

C102 (brown connector)

I/P wiring harness to engine wiring harness, in the LH front of the engine compartment, just behind the battery

Wiper/Washer Component Views in Wiper/Washer System

Inline Harness Connector End Views in Wiring Systems

C105 (white connector)

I/P wiring harness to ECM wiring harness, in the LH front of the engine compartment, just behind the battery

Wiper/Washer Component Views in Wiper/Washer System

Inline Harness Connector End Views in Wiring Systems

C115

ECM wiring harness to the engine coolant temperature jumper harness, at rear center of the engine, below C112

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Inline Harness Connector End Views in Wiring Systems

C200A

I/P wiring harness to body wiring harness, at lower LH A-pillar

Power and Grounding Component Views in Wiring Systems

Inline Harness Connector End Views in Wiring Systems

C200B

I/P wiring harness to body wiring harness, at lower LH A-pillar

Power and Grounding Component Views in Wiring Systems

Inline Harness Connector End Views in Wiring Systems

C315

Body wiring harness to driver's seat, underneath the driver's seat

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Power Seat Connector End Views in Seats

C315B

Seat belt switch to body wiring harness, underneath the driver's seat

Power Seat Component Views in Seats

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C400

Body wiring harness to fuel sender wiring harness, beneath the vehicle, near the front of the fuel tank

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Inline Harness Connector End Views in Wiring Systems

C405

Body wiring harness to rear compartment lid wiring harness, on the rear compartment lid, under the trim panel, next to the LH backup lamp

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Inline Harness Connector End Views in Wiring Systems

G103

Body and I/P wiring harnesses, located at the LH front of the engine compartment, underneath the battery tray

Wiper/Washer Component Views in Wiper/Washer System

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G400

Body wiring harness, in the lower LH corner of the rear compartment, near the LH stop/taillamp

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P101

Approximately 31 cm from the RH front wheel speed sensor

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P102

Lower RH corner of the engine compartment

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P103

Lower LH A-pillar, forward of G200

Power and Grounding Component Views in Wiring Systems

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P104

In the LH engine compartment, in the ECM housing

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P106

RH rear engine compartment

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P107

Approximately 34 cm (13 in) from the LH front wheel speed sensor

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P110

Rear LH corner of the engine compartment

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P302

In the passenger compartment, underneath the rear seats

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P400

Approximately 30 cm (12 in) from the RH rear wheel speed sensor

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P401

Lower LH corner of the rear compartment

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P402

Upper LH corner of the rear compartment, near the LH stop/taillamp

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S103

Body wiring harness, approximately 27 cm (10 in) from P107

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S104

Body wiring harness, approximately 83 cm (32 in) from P103, near P107

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S140

I/P wiring harness, near the brake fluid minimum capacity sensor connector branch break off

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S200

I/P wiring harness, near the data link connector (DLC) branch break off

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S204

I/P wiring harness, near the multifunction relay K134 connector branch break off

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S205

I/P wiring harness, approximately 17 cm (5 in) from P106

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S213

I/P wiring harness, near the data link connector (DLC) branch break off

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S218

I/P wiring harness, near the data link connector (DLC) branch break off

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S222

I/P wiring harness, near the G201 branch break off

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S225

I/P wiring harness, near the G201 branch break off

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S228

I/P wiring harness, near the G201 branch break off

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S229

I/P wiring harness, near the gauge cluster connector branch break off

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S230

I/P wiring harness, near the instrument cluster connector branch break off

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S248

I/P wiring harness, near the gauge cluster connector branch break off

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S251

I/P wiring harness, near the G201 branch break off

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S252

I/P wiring harness, near the G201 branch break off

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S262

I/P wiring harness, near the data link connector (DLC) branch break off

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S267

Body wiring harness, near the G200 branch break off

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S400

Body wiring harness, approximately 23 cm (8 in) from the RCDLR branch break off

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