GM Service Manual Online
For 1990-2009 cars only

Name

Location

Locator View

Connector End View

Ambient Light Sensor

Top of the Driver Information Center (DIC) switches

Power and Grounding Component Views in Wiring Systems

Lighting Systems Connector End Views in Lighting Systems

Back Up Lamp Switch (ML9)

RH side of the manual transmission

Engine Controls Component Views in Engine Controls 5.7L

-

Body Control Module (BCM)

RH footwell, mounted to the toe board, behind the carpet

-

Body Control System Connector End Views in Body Control Systems

Data Link Connector (DLC)

LH side of instrument panel, below the steering column

-

-

Daytime Running Lamps (DRL) Control Module

Behind the instrument cluster, under the instrument panel

-

Lighting Systems Connector End Views in Lighting Systems

Electronic Traction/Suspension Control Switch

Center console, between the shifter and storage compartment

Power and Grounding Component Views in Wiring Systems

Body Control System Connector End Views in Body Control Systems

Front/Rear Fog Lamp Switch (export)

LH side of the steering column, mounted in the instrument panel

Power and Grounding Component Views in Wiring Systems

Lighting Systems Connector End Views in Lighting Systems

Fog Lamp\Rear Compartment Lid Release Switch

Left of the steering column, mounted in the instrument panel

Power and Grounding Component Views in Wiring Systems

Lighting Systems Connector End Views in Lighting Systems

Hazard Warning Switch

Top center of Instrument Panel

Power and Grounding Component Views in Wiring Systems

Lighting Systems Connector End Views in Lighting Systems

Headlamp Opening Door Actuator Control Module

Front RH side below the RH headlamp assembly

-

Lighting Systems Connector End Views in Lighting Systems

Headlamp Switch

LH stalk of the steering column

-

Lighting Systems Connector End Views in Lighting Systems

HVAC Control Head (C60)

Center of the instrument panel, under the radio

Power and Grounding Component Views in Wiring Systems

HVAC Connector End Views in HVAC - Manual

HVAC Control Head (CJ2)

Center of the instrument panel, under the radio

Power and Grounding Component Views in Wiring Systems

HVAC Connector End Views in HVAC Automatic

Inside Rearview Mirror Lamp

Top center of windshield, bottom of mirror

-

Lighting Systems Connector End Views in Lighting Systems

Instrument Cluster

Top LH side of instrument panel, behind the steering wheel

Power and Grounding Component Views in Wiring Systems

-

Instrument Panel Compartment Lamp

In Instrument Panel compartment, top RH side

Lighting Systems Component Views in Lighting Systems

Lighting Systems Connector End Views in Lighting Systems

Instrument Panel Electrical Center

RH footwell, mounted on the toe board, behind the carpet

-

-

LF Fog Lamp

Lower front LH side of the vehicle

-

Lighting Systems Connector End Views in Lighting Systems

LF Headlamp Opening Door Assembly

In LH front side of the vehicle, between the LH fender and hood

-

Lighting Systems Connector End Views in Lighting Systems

LF Park Lamp

Lower front LH side of the vehicle

-

Lighting Systems Connector End Views in Lighting Systems

LF Park/Turn Signal Lamp

Lower front LH side of the vehicle

-

Lighting Systems Connector End Views in Lighting Systems

LF Side Marker Lamp

Lower front LH side of the vehicle

-

Lighting Systems Connector End Views in Lighting Systems

LF Turn Signal Front Lamp

Lower front LH side of the vehicle

-

Lighting Systems Connector End Views in Lighting Systems

LH Back Up Lamp (Domestic)

Attached to the LH side of the license plate opening

-

Lighting Systems Connector End Views in Lighting Systems

LH Back Up Lamp (Europe/Japan)

Attached to the LH side of the license plate opening

-

Lighting Systems Connector End Views in Lighting Systems

LH Door Ajar Indicator Switch

In rear LH door, part of the latch

Theft Deterrent System Component Views in Theft Deterrent System

Theft Deterrent System Connector End Views in Theft Deterrent

LH Door Control Module (DCM)

Behind the LH door trim panel, bottom center of the door

Entertainment Component Views in Entertainment

Power Door Systems Connector End Views in Door Systems

LH Door Switch

On the front center of the LH door trim panel

Power and Grounding Component Views in Wiring Systems

Power Door Systems Connector End Views in Door Systems

LH Instrument Panel Courtesy Lamp

Mounted in the LH footwell, top LH side

-

Lighting Systems Connector End Views in Lighting Systems

LH License Rear Lamp

Center of rear vehicle, above the LH side of license plate

-

Lighting Systems Connector End Views in Lighting Systems

LH Rear Compartment Courtesy Lamp

Attached to the LH rear compartment trim panel

-

Lighting Systems Connector End Views in Lighting Systems

LH Rear Compartment Lid Ajar Indicator Switch

LH rear compartment on the LH compartment latch

-

Body Rear End Connector End Views in Body Rear End

LH Sunshade Mirror Lamp

Behind the LH sunshade

-

Lighting Systems Connector End Views in Lighting Systems

LR Fog Lamp (Europe/Japan)

Attached to the LH side of the license plate

-

Lighting Systems Connector End Views in Lighting Systems

LR Side Marker Lamp

LH rear quarter panel, rear of the wheel well

-

Lighting Systems Connector End Views in Lighting Systems

LR Tail/Stop Lamp (Europe/Japan)

Rear of the vehicle, LH side

-

Lighting Systems Connector End Views in Lighting Systems

LR Tail/Stop/Turn Signal Lamp (Domestic)

Rear of the vehicle, LH side

-

Lighting Systems Connector End Views in Lighting Systems

LR Turn Signal Lamp (Europe/Japan)

Rear of the vehicle, LH side

-

Lighting Systems Connector End Views in Lighting Systems

Park Brake Switch

Center console, below the park brake

-

Hydraulic Brake Connector End Views in Hydraulic Brakes

Park/Neutral Position (PNP) and Back Up Switch

LH side of the transmission

Engine Controls Component Views in Engine Controls 5.7L

Engine Controls Connector End Views in Engine Controls 5.7L

Radio

Center of Instrument Panel above the HVAC control head

Power and Grounding Component Views in Wiring Systems

Entertainment Connector End Views in Entertainment

RF Fog Lamp

Lower front of the vehicle, RH side

-

Lighting Systems Connector End Views in Lighting Systems

RF Headlamp Opening Door Assembly

In RH front side of the vehicle, between the RH fender and hood

-

Lighting Systems Connector End Views in Lighting Systems

RF Park Lamp

Lower front RH side of the vehicle

-

Lighting Systems Connector End Views in Lighting Systems

RF Park/Turn Signal Lamp

Lower front RH side of the vehicle

-

Lighting Systems Connector End Views in Lighting Systems

RF Side Marker Lamp

Lower front RH side of the vehicle

-

Lighting Systems Connector End Views in Lighting Systems

RF Turn Signal Lamp

Lower front RH side of the vehicle

-

Lighting Systems Connector End Views in Lighting Systems

RF Turn Signal Lamp (Europe)

Lower front RH side of the vehicle

-

Lighting Systems Connector End Views in Lighting Systems

RH Door Ajar Indicator Switch

In rear RH door, part of the latch

Theft Deterrent System Component Views in Theft Deterrent System

Theft Deterrent System Connector End Views in Theft Deterrent

RH Door Control Module (DCM)

Behind the RH door trim panel, bottom center of the door

Entertainment Component Views in Entertainment

Power Door Systems Connector End Views in Door Systems

RH Door Switch

On the front center of the RH door trim panel

Power and Grounding Component Views in Wiring Systems

Power Door Systems Connector End Views in Door Systems

RH License Rear Lamp

Center of rear vehicle, above the right side of the license plate

-

Lighting Systems Connector End Views in Lighting Systems

RH Rear Compartment Courtesy Lamp

Attached to the RH rear compartment trim panel

-

Lighting Systems Connector End Views in Lighting Systems

RH Rear Compartment Lid Ajar Indicator Switch

RH rear compartment on the RH compartment latch

-

Body Rear End Connector End Views in Body Rear End

RH Sunshade Mirror Lamp

Behind the RH sunshade

-

Lighting Systems Connector End Views in Lighting Systems

RH Window Regulator Motor

Behind the RH door trim panel, part of the window assembly

Theft Deterrent System Component Views in Theft Deterrent System

Power Door Systems Connector End Views in Door Systems

RR Back Up Lamp (Domestic)

Attached to the RH side of the license plate opening

-

Lighting Systems Connector End Views in Lighting Systems

RR Back Up Lamp (Europe/Japan)

Attached to the RH side of the license plate opening

-

Lighting Systems Connector End Views in Lighting Systems

RR Fog Lamp (Europe/Japan)

Attached to the RH side of the license plate

-

Lighting Systems Connector End Views in Lighting Systems

RR Side Marker Lamp

RH rear quarter panel, rear of the wheel well

-

Lighting Systems Connector End Views in Lighting Systems

RR Tail/Stop Lamp (Europe/Japan)

RH side rear of the vehicle

-

Lighting Systems Connector End Views in Lighting Systems

RR Tail/Stop/Turn Signal Lamp (Domestic)

Rear of the vehicle, RH side

-

Lighting Systems Connector End Views in Lighting Systems

RR Turn Signal Lamp (Europe/Japan)

Rear of the vehicle, RH side

-

Lighting Systems Connector End Views in Lighting Systems

Star Connector #1

Instrument panel harness, serial data

-

Data Link Communications Connector End Views in Wiring Systems

Star Connector #2

Instrument panel harness, serial data

-

Data Link Communications Connector End Views in Wiring Systems

Starter Solenoid

Top of the starter motor

Engine Controls Component Views in Engine Controls 5.7L

-

Stoplamp Switch

Mounted on the bracket in front of the brake pedal

-

Automatic Transmission Inline Harness Connector End View in Automatic Transmission

Turn Signal Switch

LH stalk of the steering column

-

Lighting Systems Connector End Views in Lighting Systems

Underhood Electrical Center

RH side of the engine compartment, between the wheelhouse and the dash panel, front of the battery

Power and Grounding Component Views in Wiring Systems

-

Underhood Lamp

Attached to the RH underside of the hood

-

Lighting Systems Connector End Views in Lighting Systems

C100 (8 cavities)

Forward lamp harness to forward lamp jumper harness

-

-

C102 (8 cavities)

Instrument panel harness to forward lamp harness, RH side rear of engine compartment

-

-

C140 (10 cavities)

Transmission harness to forward lamp harness, RH side in engine compartment

-

-

C200 (6 cavities)

Instrument panel harness to RH door harness, in box on A Pillar on RH Door

Entertainment Component Views in Entertainment

-

C201 (6 cavities)

Instrument panel harness to LH door harness, in box on A Pillar or LH Door

Entertainment Component Views in Entertainment

-

C202 (10 cavities)

Instrument panel harness to RH door harness, in box on A Pillar on RH Door

Entertainment Component Views in Entertainment

-

C203 (10 cavities)

Instrument panel harness to LH door harness, in box on A Pillar or LH Door

Entertainment Component Views in Entertainment

-

C204 (4 cavities)

Instrument panel harness to front body harness

-

-

C209 (23 cavities)

Instrument panel harness to steering column harness, at the base of steering column - headlamp and turn signal switches

-

-

C215 (10 cavities)

Hazard switch jumper to Instrument panel harness

-

-

C400 (8 cavities)

Transmission harness to rear body harness, rear center of vehicle above differential

-

-

P200

Instrument panel harness, RH side of Instrument panel on dash panel

-

-

P201

Instrument panel harness, LH side of Instrument panel in "A" Pillar

-

-

P202

Instrument panel harness, RH side of Instrument panel in "A" Pillar

-

-

P501

In front of the LH door

-

-

P600

In front of the RH door

-

-

S200

Instrument panel harness, approximately 22.5 cm right of the inside rearview mirror breakout (CKT 640)

-

-

S202

Instrument panel harness, approximately 46.5 cm right of the inside rearview mirror breakout (CKT 150)

-

-

S205

Instrument panel harness, approximately 12.5 cm left of the Data Link Connector (DLC) breakout (CKT 9)

-

-

S206

Instrument panel harness, approximately 14.0 cm right of the blower motor control module connector breakout (CKT 1132)

-

-

S209 - IDC (Canada)

Instrument panel harness, approximately 20.0 cm from the end of instrument cluster connector (CKT 14)

-

-

S211 - IDC (Canada)

Instrument panel harness, approximately 30 cm from the end of the Instrument cluster connector (CKT 15)

-

-

S217 - IDC (Canada)

Instrument panel harness, approximately 7.0 cm left of the Data Link Connector (DLC) breakout (CKT 103)

-

-

S303

Front body harness, approximately 22.5 cm from the RH rear speaker breakout, toward RH rear compartment lamp (CKT 740)

-

-

S304

Front body harness, approximately 15.0 cm from the RH rear speaker breakout, toward RH rear compartment lamp (CKT 744)

-

-

S400

Transmission harness, approximately 6.5 cm rearward of C402 breakout (CKT 339)

-

-

S406

Transmission harness, approximately 29.5 cm from EBTCM toward RH rear shock absorber (CKT 820)

-

-

S420 (Europe)

Rear body harness, approximately 6.5 cm right of the connector C400 breakout (CKT 122)

-

-

S480 (Japan/Europe)

Rear body harness, approximately 3.5 cm right of the splice pack #400 breakout (CKT 9)

-

-

S481 (Japan/Domestic)

Rear body harness, approximately 6.5 cm right of the LH back up lamp connector breakout (CKT 18)

-

-

S482

Rear body harness, approximately 21.5 cm left of the splice pack #400 breakout (CKT 24)

-

-

S483 (Japan/Europe)

Rear body harness, approximately 6.5 cm left of the LH back up lamp connector breakout (CKT 9)

-

-

S484 (Domestic)

Rear body harness, approximately 7.0 cm left of the splice pack #400 breakout (CKT 24)

-

-

S490 (Japan/Europe)

Rear body harness, approximately 13.0 cm left of the connector C400 breakout (CKT 820)

-

-

S492 (Domestic)

Rear body harness, approximately 6.5 cm left of the RH turn signal breakout (CKT 19)

-

-

S494 (Japan/Europe)

Rear body harness, approximately 6.5 cm left of the RH turn signal breakout (CKT 9)

-

-

S496 (Japan/Europe)

Rear body harness, approximately 6.5 cm left of the connector C400 breakout (CKT 19)

-

-

SP100 - Splice Pack #100

Forward lamp harness, attached to G102

-

-

SP101 - Splice Pack #101

Forward lamp harness, attached to G101

-

-

SP102 - Splice Pack #102

Forward lamp jumper, taped to harness approximately 10 cm left of C100. Grounded to G102

-

-

SP201 - Splice Pack #201

Instrument panel harness, part of G201

-

-

SP202 - Splice Pack #202

Instrument panel harness, attached to G202

-

-

SP400 - Splice Pack #400

Rear body harness, taped back to harness between backup lamp and tail/stop lamp breakouts. Grounded to G401

-

-

SP402 - Splice Pack #402

Rear body harness, taped back to harness between backup lamp and tail/stop lamp breakouts. Grounded to G401

-

-

G101

On frame rail between LH headlamp assembly and generator. SP101 is attached

-

-

G102

Rear of RH wheelhouse, between battery and U/H electrical center

-

-

G201

Instrument panel harness, at base of LH A Pillar. SP201 is attached

-

-

G202

Instrument panel harness, at base of RH A Pillar. SP202 is attached

-

-

G401

Transmission harness, LH rear of vehicle

-

-