GM Service Manual Online
For 1990-2009 cars only

Name

Location

Locator View

Connector End View

Body Relay Block

RH of the IP, left of the IP Fuse Block

Power and Grounding Component Views in Wiring Systems

Power and Grounding Connector End Views in Wiring Systems

Body Control Module (BCM)

Lower rear of the IP, on the heater

Body Control System Component Views

--

Body Control Module (BCM) Connector C1, (24 Cavities)

Lower rear of the IP, on the heater

Body Control System Component Views

Body Control System Connector End Views

Body Control Module (BCM) Connector C2, (24 Cavities)

Lower rear of the IP, on the heater

Body Control System Component Views

Body Control System Connector End Views

Body Control Module (BCM) Connector C3, (16 Cavities)

Lower rear of the IP, on the heater

Body Control System Component Views

Body Control System Connector End Views

Courtesy Lamp Relay

In the body relay block

Power and Grounding Component Views in Wiring Systems

--

Cruise Control Module (CCM)

RH Rear of the engine compartment, on the cowl

Cruise Control Component Views in Cruise Control

Cruise Control Connector End Views in Cruise Control

Data Link Connector (DLC)

Lower RH of the IP

Data Link Communications Component Views in Data Link Communications

Data Link Communications Connector End Views in Data Link Communications

Door Handle Switch, LH

Part of the door latch assembly

Body Control System Component Views

Body Control System Connector End Views

Door Handle Switch, RH

Part of the door latch assembly

Body Control System Component Views

Body Control System Connector End Views

Door Lock Cylinder Switch, LH

Part of the door latch assembly

Power Door Systems Component Views in Doors

Power Door Systems Connector End Views in Doors

Door Lock Cylinder Switch, RH

Part of the door latch assembly

Power Door Systems Component Views in Doors

Power Door Systems Connector End Views in Doors

Door Lock Relay

In the body relay block

Power and Grounding Component Views in Wiring Systems

Electrical Center Identification Views in Wiring Systems

Door Unlock Relay

In the body relay block

Power and Grounding Component Views in Wiring Systems

Electrical Center Identification Views in Wiring Systems

Drivers Door Unlock Relay

In the body relay block

Power and Grounding Component Views in Wiring Systems

Electrical Center Identification Views in Wiring Systems

Driver Information Display Module

Front overhead console, in the passenger compartment

Driver Information System Components Views in Instrument Panel, Gauges and Console

--

Driver Information Display Module Connector C1 (6 Cavities)

Front overhead console, in the passenger compartment

Driver Information System Components Views in Instrument Panel, Gauges and Console

Driver Information Systems Connector End Views in Instrument Panel, Gauges and Console

Flash To Pass Relay

In the rear of the engine compartment, on the cowl

Power and Grounding Component Views in Wiring Systems

Electrical Center Identification Views in Wiring Systems

Fog Lamp Relay, Front

In the body relay block

Power and Grounding Component Views in Wiring Systems

Electrical Center Identification Views in Wiring Systems

Fog Lamp Relay, Rear

In the underhood fuse block

Power and Grounding Component Views in Wiring Systems

Electrical Center Identification Views in Wiring Systems

Fog Lamp Switch, Front

Right side of the IP, near the IP dimmer switch

Lighting Systems Component Views in Lighting Systems

Lighting Systems Connector End Views in Lighting Systems

Fog Lamp Switch, Rear

Right side of the IP, near the IP dimmer switch

Lighting Systems Component Views in Lighting Systems

Lighting Systems Connector End Views in Lighting Systems

Hazard Warning Switch

Center of the IP, next to the radio

Lighting Systems Component Views in Lighting Systems

Lighting Systems Connector End Views in Lighting Systems

Headlamp Ambient Light Sensor

Top left of the IP

Lighting Systems Component Views in Lighting Systems

Lighting Systems Connector End Views in Lighting Systems

Headlamp Grounding Relay

In the Underhood Fuse Block

Power and Grounding Component Views in Wiring Systems

Electrical Center Identification Views in Wiring Systems

Headlamp, LH High Beam

The inner headlamp bulb

Lighting Systems Component Views in Lighting Systems

Lighting Systems Connector End Views in Lighting Systems

Headlamp, LH Low Beam

The outer headlamp bulb

Lighting Systems Component Views in Lighting Systems

Lighting Systems Connector End Views in Lighting Systems

Headlamp, RH High Beam

The inner headlamp bulb

Lighting Systems Component Views in Lighting Systems

Lighting Systems Connector End Views in Lighting Systems

Headlamp, RH Low Beam

The outer headlamp bulb

Lighting Systems Component Views in Lighting Systems

Lighting Systems Connector End Views in Lighting Systems

Headlamp Power Relay

In the underhood fuse block

Power and Grounding Component Views in Wiring Systems

Electrical Center Identification Views in Wiring Systems

Headlamp Washer Pump Relay

Mounted on the center radiator core support

Wiper/Washer Component Views in Wipers/Washer Systems

Wiper/Washer Connector End Views in Wipers/Washer Systems

Horn, LH

In the LH fenderwell

Horn Component Views in Horns

Horn Connector End Views in Horns

Horn, RH

In the RH fenderwell

Horn Component Views in Horns

Horn Connector End Views in Horns

Horn Relay

In the underhood fuse block

Power and Grounding Component Views in Wiring Systems

Electrical Center Identification Views in Wiring Systems

Horn Switch

Part of the steering column

Horn Component Views in Horns

--

Ignition Key Alarm Switch

At the ignition switch, part of the lock module

--

--

Inadvertent Power Lamp Relay

In the body relay block

Power and Grounding Component Views in Wiring Systems

--

Instrument Cluster

In the IP, ahead of the steering column

Driver Information System Components Views in Instrument Panel, Gauges and Console

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

IP Dimmer Switch

On the right IP, near the fog lamp switch

Lighting Systems Component Views in Lighting Systems

Lighting Systems Connector End Views in Lighting Systems

IP Fuse Block

RH of the IP, near the side door jamb switch

Power and Grounding Component Views in Wiring Systems

Electrical Center Identification Views in Wiring Systems

Multifunction Switch (T/SIG, & HDLP, HDLP/DM, and FTP)

RH side of the steering column

Steering Column Disassembled View in Steering Wheel and Column - Tilt

Lighting Systems Connector End Views in Lighting Systems

Park Brake Indicator Switch

Part of the automatic transmission controller

Hydraulic Brake Component Views in Hydraulic Brakes

Hydraulic Brake Connector End Views in Hydraulic Brakes

Park Lamp Relay

In the body relay block

Power and Grounding Component Views in Wiring Systems

Electrical Center Identification Views in Wiring Systems

Passlockā„¢ Sensor

At the ignition switch, part of the lock module

Theft Deterrent System Component Views in Theft Deterrent

Theft Deterrent System Connector End Views in Theft Deterrent

Radio

Center of the IP

Entertainment Component Views in Entertainment

Entertainment Connector End Views in Entertainment

Rear Window Wiper Cutout and Liftglass Ajar Jamb Switch

In the endgate near the latch

Wiper/Washer Component Views in Wipers/Washer Systems

Wiper/Washer Connector End Views in Wipers/Washer Systems

Rear Wiper/Washer And Endgate Window Release Switch

On the center console

Wiper/Washer Component Views in Wipers/Washer Systems

Wiper/Washer Connector End Views in Wipers/Washer Systems

Remote Control Door Lock Receiver (Japan)

On the RH IP sound insulator

Keyless Entry Component Views in Keyless Entry

Keyless Entry Connector End Views in Keyless Entry

Remote Control Door Lock Receiver (UK/S Africa)

Below the left IP, near the A pillar

Keyless Entry Component Views in Keyless Entry

Keyless Entry Connector End Views in Keyless Entry

Retained Accessory Power Relay

In the body relay block

Power and Grounding Component Views in Wiring Systems

Electrical Center Identification Views in Wiring Systems

Seat Belt Switch

Under the right seat

--

Seat Belt Connector End Views in Seat Belts

Side Door Jamb Switch, LF

LH of the IP

Body Control System Component Views

Body Control System Connector End Views

Side Door Jamb Switch, RF

RH of the IP

Body Control System Component Views

Body Control System Connector End Views

Side Door Jamb Switch, LR

In the LH B pillar

Body Control System Component Views

Body Control System Connector End Views

Side Door Jamb Switch, RR

In the RH B pillar

Body Control System Component Views

Body Control System Connector End Views

Transfer Case Shift Control Switch Connector C2 (4 Cavities)

At the front center of the IP, above the right of the radio

Transfer Case Control Component Views in Transfer Case

Transfer Case Control Connector End Views in Transfer Case

Underhood Fuse Block

On the top of the right inner wheelwell, near the battery

Power and Grounding Component Views in Wiring Systems

--

Underhood Fuse Block Connector C1 (68 Cavities) (Body)

Below the underhood fuse block

Power and Grounding Component Views in Wiring Systems

Power and Grounding Connector End Views in Wiring Systems

Underhood Fuse Block Connector C3 (32 Cavities) (Chassis)

Below the underhood fuse block

Power and Grounding Component Views in Wiring Systems

Power and Grounding Connector End Views in Wiring Systems

Underhood Fuse Block Connector C4 (32 Cavities) (Forward Lamps)

Below the underhood fuse block

Power and Grounding Component Views in Wiring Systems

Power and Grounding Connector End Views in Wiring Systems

Underhood Fuse Block Connector C5 (2 Cavities) (Body)

Below the underhood fuse block

Power and Grounding Component Views in Wiring Systems

Power and Grounding Connector End Views in Wiring Systems

Vehicle Control Module (VCM)

LH of the engine compartment

Engine Controls Component Views in Engine Controls - 4.3L

--

Vehicle Control Module (VCM) Connector C4 (24 Cavities)

LH of the engine compartment

Engine Controls Component Views in Engine Controls - 4.3L

VCM Connector End Views in Engine Controls - 4.3L

C106 (8 Cavities)

Forward lamps to body harness, inside the right front fender near the underhood fuse block

Harness Routing Views in Wiring Systems

Inline Harness Connector End Views in Wiring Systems

C203 (116 Cavities)

Body harness to IP harness, to the left of the IP

Harness Routing Views in Wiring Systems

Inline Harness Connector End Views in Wiring Systems

C209 (16 Cavities)

Body harness to dome harness, at the LH front of the IP

Harness Routing Views in Wiring Systems

Inline Harness Connector End Views in Wiring Systems

C211 (48 Cavities)

Body harness to steering column harness, steering column in front of the IP

Harness Routing Views in Wiring Systems

Inline Harness Connector End Views in Wiring Systems

C315 (6 Cavities)

Body harness to right front power seat pigtail connector, under the right front seat

Harness Routing Views in Wiring Systems

Inline Harness Connector End Views in Wiring Systems

C411 (2 Cavities)

Body harness to endgate harness, rear left center of the body, at the endgate

Harness Routing Views in Wiring Systems

Inline Harness Connector End Views in Wiring Systems

C501 (22 Cavities)

Body harness to left front door harness, near the P500

Harness Routing Views in Wiring Systems

Inline Harness Connector End Views in Wiring Systems

C610 (22 Cavities)

Body harness to right front door harness, near the P600

Harness Routing Views in Wiring Systems

Inline Harness Connector End Views in Wiring Systems

D101

Between the S228 and S229 splices

Harness Routing Views in Wiring Systems

--

D200

Between the S231 and S232 splices

Harness Routing Views in Wiring Systems

--

D201

Between the S235 and S236 splices

Harness Routing Views in Wiring Systems

--

G110

(CKT 150) At the body harness, to the left of the radiator support

Harness Routing Views in Wiring Systems

--

G111

(CKT 150) At the forward lamps harness, to the left of the radiator support

Harness Routing Views in Wiring Systems

--

G112

(CKT 250) At the forward lamps harness, to the right inside of the radiator support

Harness Routing Views in Wiring Systems

--

G117

(CKT 850) At the body harness, to the right rear of the engine compartment, near the cruise control module

Harness Routing Views in Wiring Systems

--

G200

(CKT 1850) At the body harness, to the left front of the IP, above P100

Harness Routing Views in Wiring Systems

--

G201

(CKT 1850) At the body harness, to the left front of the IP, above P100

Harness Routing Views in Wiring Systems

--

G202

(CKT 1850) At the body harness, to the left front of the IP, above P100

Harness Routing Views in Wiring Systems

--

G203

(CKT 1850) At the body harness, to the right of the IP

Harness Routing Views in Wiring Systems

--

G205

(CKT 1050) At the body harness, to the right of the IP

Harness Routing Views in Wiring Systems

--

G450

(CKT 1350) At the body harness, in the left rear body corner, near the tail lamp harness

Harness Routing Views in Wiring Systems

--

P100

At the IP bulkhead pass-through, to the right rear of the engine compartment, on the cowl

Harness Routing Views in Wiring Systems

--

P500

At the body harness to the left front door pass-through, between the body and the left front door

Harness Routing Views in Wiring Systems

--

P600

At the body harness to left front door pass-through, between the body and the right front door

Harness Routing Views in Wiring Systems

--

P900

At the body to endgate, between the body harness and the endgate

Harness Routing Views in Wiring Systems

--

S112

(CKT 198) In the forward lamp harness 12 cm (4.72 in) toward the C106 connector from the RH horn connector breakout

Harness Routing Views in Wiring Systems

--

S117

(CKT 74) In the body harness, 26 cm (10.24 in) from the breakout to the windshield wiper motor connector, toward the underhood fuse block

Harness Routing Views in Wiring Systems

--

S118

(CKT 1020) At the engine harness, between the A/C refrigerant pressure sensor breakout and the C111 breakout, 20 cm (7.87 in) from the breakout to the refrigerant pressure sensor

Harness Routing Views in Wiring Systems

--

S119

(CKT 240) In the body harness, 13 cm (5.12 in) from the breakout to the windshield wiper motor connector, toward the underhood fuse block

Harness Routing Views in Wiring Systems

--

S122

(CKT 2234) In the body harness, 13 cm (5.12 in) from the breakout to the EBCM C1 connector, toward the C106 connector

Harness Routing Views in Wiring Systems

--

S201

(CKT 1807) Body harness, 13 cm (5.12 in) from the BCM connector breakout toward the C211 steering column harness connector

Harness Routing Views in Wiring Systems

--

S202

(CKT 1415) In the body harness, 19.5 cm (7.68 in) from the BCM connector breakout toward C211

Harness Routing Views in Wiring Systems

--

S204

(CKT 41) In the body harness, 45 cm (17.72 in) from the BCM connector breakout toward C211

Harness Routing Views in Wiring Systems

--

S205

(CKT 1220) At the IP harness, between the breakouts for the instrument cluster and BCM connector C3, 6.5 cm (2.6 in) from the breakout to the BCM connector

Harness Routing Views in Wiring Systems

--

S207

(CKT 817) Body harness, 32.5 cm (12.8 in) from the BCM connector breakout toward the C211 steering column harness connector

Harness Routing Views in Wiring Systems

--

S209

(CKT 1850) In the body harness, 6.5 cm (2.6 in) from the BCM connector breakout toward C211

Harness Routing Views in Wiring Systems

--

S211

(CKT 1850) In the body harness, 6.5 cm (2.6 in) from the G203, G204, and G205 ground breakout and the ground terminals

Harness Routing Views in Wiring Systems

--

S212

(CKT 1414) At the body harness, 26 cm (10.24 in) from the BCM connector breakout toward C211

Harness Routing Views in Wiring Systems

--

S214

(CKT 461) At the body harness, 4 cm (1.57 in) from the BCM connector breakout toward C203

Harness Routing Views in Wiring Systems

--

S221

(CKT 524) At the body harness, 4 cm (1.57 in) from the DLC breakout toward the body harness conduit opening

Harness Routing Views in Wiring Systems

--

S225

(CKT 1414) At the IP harness between the breakouts for the BCM C3 and the radio connector, 13 cm (5.2 in) from the BCM C3 breakout

Harness Routing Views in Wiring Systems

--

S226

(CKT 1415) At the IP harness between the breakouts for the BCM C3 and the radio connector, 6.5 cm (2.6 in) from the BCM C3 breakout

Harness Routing Views in Wiring Systems

--

S228

(CKT 103) At the body harness, 15 cm (5.91 in) from the breakout to the headlamp switch relay in the headlamp switch relay harness

Harness Routing Views in Wiring Systems

--

S229

(CKT 352) At the body harness, 15 cm (5.91 in) from the breakout to the headlamp switch relay in the headlamp switch relay harness

Harness Routing Views in Wiring Systems

--

S231

(CKT 1356) In the body harness, inside the breakout to C211, 17.5 cm (6.89 in) from the main body harness

Harness Routing Views in Wiring Systems

--

S232

(CKT 307) In the body harness, inside the breakout to C211, 12.5 cm (4.92 in) from the main body harness

Harness Routing Views in Wiring Systems

--

S235

(CKT 198) In the body harness, inside the breakout to C211, 25 cm (9.84 in) from the main body harness

Harness Routing Views in Wiring Systems

--

S236

(CKT 1485) In the body harness, inside the breakout to C211, 20 cm (7.87 in) from the main body harness

Harness Routing Views in Wiring Systems

--

S283

(CKT 2409) In the IP harness, between the breakouts for the BCM connector C3 and the cigar lighter connector C224, 6.5 cm (2.6 in) from the BCM C3 breakout

Harness Routing Views in Wiring Systems

--

S305

(CKT 727) In the body harness 4.85 cm (1.91 in) from the breakout for the RH power seat connector, toward the breakout for the side door jamb switch, RR

Harness Routing Views in Wiring Systems

--

S320

(CKT 1350) In the RH power seat harness

Harness Routing Views in Wiring Systems

--

S427

(CKT 1350) At the left rear body harness, 7 cm (2.75 in) below the breakout to the left tail lamp connector C403

Harness Routing Views in Wiring Systems

--

S428

(CKT 34) At the left rear body harness, 19.5 cm (7.68 in) forward of the breakout to the left tail lamp connector C403

Harness Routing Views in Wiring Systems

--

S501

(CKT 1850) In the LH door harness, between the breakouts for the door speaker connector and the door lock and side window switch connector, 5 cm (2 in) from the door lock and side window switch breakout

Harness Routing Views in Wiring Systems

--

S603

(CKT 1850) In the RH door harness, between the breakouts for the outside rear view mirror C604 and the side window regulator motor C1, 9 cm (3.54 in) from the C604 breakout

Harness Routing Views in Wiring Systems

--

Splice Pack SP100

(CKT 150) At the forward lamp harness, to the left rear of the radiator support

Harness Routing Views in Wiring Systems

--

Splice Pack SP101

(CKT 250) At the forward lamp harness, to the right inside of the radiator support

Harness Routing Views in Wiring Systems

--

Splice Pack SP203

(CKT 1850) IP harness, on the IP, in front of the ashtray

Harness Routing Views in Wiring Systems

--