GM Service Manual Online
For 1990-2009 cars only

Name

Location

Locator View

Connector End View

Body Control Module (BCM)

Mounted on the right 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

Data Link Connector (DLC)

Attached to the IP carrier, to the left of the steering column

--

Data Link Communications Connector End Views in Data Link Communications

Electronic Brake/Traction Control Module (EBTCM)

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

Antilock Brake System Component Views in Antilock Brake System

Antilock Brake System Connector End Views in Antilock Brake System

Engine Control Module (ECM)

Left front of the engine compartment, in the ECM housing, at position 40

Engine Controls Component Views in Engine Controls - 3.0L

Engine Controls Connector End Views in Engine Controls - 3.0L

Front Side Door Jamb Switch (LH)

Lower left A-Pillar

--

Lighting Systems Connector End Views in Lighting Systems

Front Side Door Jamb Switch (RH)

Lower right A-Pillar

--

Lighting Systems Connector End Views in Lighting Systems

Front Side Door Lock Switch (LH)

Mounted to the inside left front side door trim panel

--

Lighting Systems Connector End Views in Lighting Systems

Front Side Door Lock Switch (RH)

Mounted to the inside right front side door trim panel

--

Lighting Systems Connector End Views in Lighting Systems

Fuse Block

Mounted to the IP, lower left side of the steering column

--

--

Gauge Cluster

Left side of the IP, just to the left and above the heater & A/C control

--

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

Horn Relay K63

Lower IP, to the right side of the steering column, on the relay box

--

Horn Connector End Views in Horns

Ignition Switch

Mounted to the ignition lock cylinder

--

Engine Electrical Connector End Views in Engine Electrical

Low Beam Relay K131

Lower IP, to the right side of the steering column, on the relay box

Power and Grounding Component Views in Wiring Systems

Lighting Systems Connector End Views in Lighting Systems

Park Lamp Relay K130

Lower IP, to the right side of the steering column, on the relay box

Power and Grounding Component Views in Wiring Systems

Lighting Systems Connector End Views in Lighting Systems

Power Distribution Fuse Block

Left side of the engine compartment, attached to the ECM housing, above the battery

Power and Grounding Component Views in Wiring Systems

--

Rear Compartment Courtesy Lamp Switch

Attached to the rear compartment lid

--

--

Rear Side Door Jamb Switch (LH)

Lower left B-Pillar

--

Lighting Systems Connector End Views in Lighting Systems

Rear Side Door Jamb Switch (RH)

Lower right B-Pillar

--

Lighting Systems Connector End Views in Lighting Systems

Theft Deterrent Module

Mounted to the ignition lock cylinder, on the upper right side of the steering column

--

Theft Deterrent System Connector End Views

C200A

IP wiring harness to body wiring harness, at the lower left A-Pillar

Power and Grounding Component Views in Wiring Systems

Inline Harness Connector End Views in Wiring Systems

C200B

IP wiring harness to body wiring harness, at the lower left A-Pillar

Power and Grounding Component Views in Wiring Systems

Inline Harness Connector End Views in Wiring Systems

C301

Body wiring harness to right courtesy lamp wiring harness, at the base of the right B-Pillar

--

Inline Harness Connector End Views in Wiring Systems

C302

Body wiring harness to left courtesy lamp wiring harness, at the base of the left B-Pillar

--

Inline Harness Connector End Views in Wiring Systems

C405

Body wiring harness to rear compartment lid harness

--

Inline Harness Connector End Views in Wiring Systems

C500

Body wiring harness to left front side door wiring harness, at the lower left A-Pillar, near G200

Power Door Systems Component Views in Doors

Inline Harness Connector End Views in Wiring Systems

C600

Body wiring harness to right front side door wiring harness, at the lower right A-Pillar

Power Door Systems Component Views in Doors

Inline Harness Connector End Views in Wiring Systems

G103

Body and IP wiring harnesses, located at the left front of the engine compartment, near C102, C105, and C106, underneath the battery tray

Wiper/Washer Component Views in Wiper/Washer System

--

G200

Body wiring harness, at the lower left A-Pillar, above and to the right of C200

Power and Grounding Component Views in Wiring Systems

--

P103

Lower left A-Pillar, forward of G200

Power and Grounding Component Views in Wiring Systems

--

P108

Left engine compartment, at the rear of the ECM housing

--

--

P110

Rear left corner of the engine compartment

--

--

P401

Lower left corner of the rear compartment

--

--

P402

Upper left corner of the rear compartment, near the left taillamp

--

--

P500

In the left front side door, approximately 12 cm (5 in) from the outside remote control rear view mirror switch

--

--

P600

In the right front side door, approximately 25 cm (10 in) from the right front side door lock switch

--

--

S103

Body wiring harness, approximately 15 cm (6 in) from branch break off for the left headlamp, towards the EBTCM branch break off

--

--

S104

Body wiring harness, approximately 71 cm (28 in) from P103, towards the EBTCM branch break off

--

--

S200

IP wiring harness, approximately 15 cm (6 in) from cruise release switch and stoplamp switch branch break off, towards G201 branch break off

--

--

S214

IP wiring harness, approximately 17 cm (7 in) from cruise release switch and stoplamp switch branch break off, towards G201 branch break off

--

--

S222

IP wiring harness, near G201 branch break off

--

--

S245

IP wiring harness, near the multifunction relay module connector branch break off

--

--

S250

IP wiring harness, near the instrument cluster connector branch break off

--

--

S251

IP wiring harness, near the G201 branch break off

--

--

S267

Body wiring harness, near G200 branch break off

--

--

S270

Body wiring harness, approximately 70 cm (27 in) from the console wiring branch break off

--

--

S308

Body wiring harness, base of the right A-Pillar, just under the conduit

--

--

S309

Body wiring harness, base of the right A-Pillar, just under the conduit

--

--

S312

Body wiring harness, base of the left A-Pillar, just under the conduit

--

--

S314

Body wiring harness, base of the left A-Pillar, just under the conduit

--

--

S317

Body wiring harness, base of the left A-Pillar, just under the conduit

--

--

S319

Body wiring harness, base of the left A-Pillar, just under the conduit

--

--

S502

Left front side door wiring harness, approximately 26 cm (10 in) from connector

--

--

S602

Left front side door wiring harness, approximately 26 cm (10 in) from connector

--

--