GM Service Manual Online
For 1990-2009 cars only

Name

Location

Locator View

Connector End View

Ambient Light Sensor

On the top center of the instrument panel (IP) in the grille assembly

Lighting Systems Component Views

Lighting Systems Connector End Views

Ashtray Lamp

Inside the top of the ashtray assembly

Lighting Systems Component Views

--

Automatic Day - Night Mirror w/Compass/Temperature

On the top center of the windshield

Stationary Windows Component Views in Stationary Windows

Stationary Windows Connector End Views in Stationary Windows

Automatic Transfer Case (ATC) Select Switch

To the left of the instrument cluster above the headlamp switch on the IP

Transfer Case Control Component Views in Transfer Case NVG 246-NP8

Transfer Case Control Connector End Views in Transfer Case NVG 246-NP8

Back-up Lamp Switch (Auto) (Part of Park/Neutral Position Switch)

On the left side of the transmission

Lighting Systems Component Views

Lighting Systems Connector End Views

Back-up Lamp Switch (Manual)

On the left side of the transmission

Lighting Systems Component Views

Lighting Systems Connector End Views

Back-up Lamp, LH

Part of the left rear lamps

Lighting Systems Component Views

--

Back-up Lamp, RH

Part of the right rear lamps

Lighting Systems Component Views

--

Body Control Module (BCM)

On the lower left side of the IP below the steering column

Body Control System Component Views in Body Control System

Body Control System Connector End Views in Body Control System

Body Wiring Harness Junction Block

Under the left side of the instrument panel near the left kick panel

Power and Grounding Component Views in Wiring Systems

Power and Grounding Connector End Views in Wiring Systems

Camper Harness Inline Connector

On the left frame rail rear towards the rear of the vehicle

Lighting Systems Component Views

Lighting Systems Connector End Views

Cargo Lamp Switch

To the right side of the steering column in the IP

Lighting Systems Component Views

Lighting Systems Connector End Views

Center High Mounted Stop/Cargo Lamp (Pickup)

On the center top rear of the cab

Lighting Systems Component Views

Lighting Systems Connector End Views

Clearance Lamp, LH

On the top of the cab on the left side

Lighting Systems Component Views

Lighting Systems Connector End Views

Clearance Lamp, RH

On the top of the cab on the right side

Lighting Systems Component Views

Lighting Systems Connector End Views

Compartment Lamp

In the instrument panel compartment box

--

Lighting Systems Connector End Views

Console Bin Lamp

In the console between the seats

--

Lighting Systems Connector End Views

Courtesy Lamp Relay

In the Body Wiring Harness Junction Block

Electrical Center Identification Views in Wiring Systems

--

Courtesy Lamp, LF

On the left lower dash to the left of the pedal assembly

Lighting Systems Component Views

--

Courtesy Lamp, RF

On the right lower dash below the IP compartment

Lighting Systems Component Views

--

Cruise Control Module

On the left front of the dash in the engine compartment

Cruise Control Component Views in Cruise Control

Cruise Control Connector End Views in Cruise Control

Cruise Control Switch

On the left side of the steering column on the multifunction switch

Tilt Wheel/Column Component Views in Steering Wheel and Column-Tilt

--

Cupholder Lamp - Console

In the console between the front seats

--

--

Cupholder Lamp - Bezel

Near the center of the IP

--

--

Daytime Running Lamp, LH

Below the left headlamp assembly

Lighting Systems Component Views

Lighting Systems Connector End Views

Daytime Running Lamp, RH

Below the right headlamp assembly

Lighting Systems Component Views

Lighting Systems Connector End Views

Daytime Running Lamps (DRL) Relay

In the Engine Wiring Harness Junction Block

Electrical Center Identification Views in Wiring Systems

--

Dome Lamp

At the front center of the headliner

Lighting Systems Component Views

Lighting Systems Connector End Views

Dome Lamp - Rear

In the rear of the headliner

--

Lighting Systems Connector End Views

Dome/Reading Lamp

At the front center of the headliner

Lighting Systems Component Views

Lighting Systems Connector End Views

Dome/Reading Lamp - Middle

In the middle of headliner

--

Lighting Systems Connector End Views

Dome/Reading Lamp - Rear

In the rear of headliner

--

Lighting Systems Connector End Views

Door Courtesy Lamp, LF

On the left door trim panel

Lighting Systems Component Views

Lighting Systems Connector End Views

Door Courtesy Lamp, RF

On the right door trim panel

Lighting Systems Component Views

Lighting Systems Connector End Views

Door Courtesy Lamp, LR

On the left rear door trim panel

--

Lighting Systems Connector End Views

Door Courtesy Lamp, RR

On the right rear door trim panel

--

Lighting Systems Connector End Views

Engine Wiring Harness Junction Block

At the left side of the engine compartment near the battery

Power and Grounding Component Views in Wiring Systems

Power and Grounding Connector End Views in Wiring Systems

Fog Lamp Relay

In the Engine Wiring Harness Junction Block

Electrical Center Identification Views in Wiring Systems

--

Fog Lamp Switch

To the right of the steering column on the IP

Lighting Systems Component Views

Lighting Systems Connector End Views

Fog Lamp, LH

On the left side of the front bumper

Lighting Systems Component Views

Lighting Systems Connector End Views

Fog Lamp, RH

On the right side of the front bumper

Lighting Systems Component Views

Lighting Systems Connector End Views

Front Marker Lamp, LH

On the left front of the vehicle

Lighting Systems Component Views

--

Front Marker Lamp, RH

On the right front of the vehicle

Lighting Systems Component Views

--

Front Park/Turn Lamp, LH

On the left front of the vehicle

Lighting Systems Component Views

Lighting Systems Connector End Views

Front Park/Turn Lamp, RH

On the right front of the vehicle

Lighting Systems Component Views

Lighting Systems Connector End Views

Fuse Block

On the lower left side of the IP

Power and Grounding Component Views in Wiring Systems

Power and Grounding Connector End Views in Wiring Systems

Headlamp & Panel Dimmer Switch

To the left of the steering wheel on the IP

Lighting Systems Component Views

Lighting Systems Connector End Views

Headlamp (AHL) Relay

In the Engine Wiring Harness Junction Block

Electrical Center Identification Views in Wiring Systems

--

Headlamp Dimmer Switch

Inside the steering column, controlled by the multifunction switch

--

--

Heated Seat Switch, Driver

In the left door trim panel

Power Seat Component Views in Seats

--

Heated Seat Switch, Passenger

In the right door trim panel

Power Seat Component Views in Seats

--

High Beam Lamp, LH

On the left front of the vehicle

Lighting Systems Component Views

Lighting Systems Connector End Views

High Beam Lamp, RH

On the right front of the vehicle

Lighting Systems Component Views

Lighting Systems Connector End Views

HVAC Blower Switch (part of HVAC Control Module)

Under the radio in the center of the IP

HVAC Component Views in Heating, Ventilation, and Air Conditioning

HVAC Connector End Views in Heating, Ventilation, and Air Conditioning

Inadvert Power Relay

In the Body Wiring Harness Junction Block

Electrical Center Identification Views in Wiring Systems

--

Inflatable Restraint IP Module Switch

Near the center of the IP below the HVAC control module

SIR Component Views in SIR

SIR Connector End Views in SIR

Instrument Cluster

On the left side of the IP above the steering column

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

Instrument Panel Compartment Lamp - RH

Below the right side of the IP compartment

Lighting Systems Component Views

Lighting Systems Connector End Views

License Lamps

In the center of the rear bumper

Lighting Systems Component Views

--

Low Beam Lamp, LH

At the left front of the vehicle

Lighting Systems Component Views

Lighting Systems Connector End Views

Low Beam Lamp, RH

At the right front of the vehicle

Lighting Systems Component Views

Lighting Systems Connector End Views

Malfunction Indicator Lamp (MIL)

Part of the instrument cluster (IC)

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

Map Lamp

In the front part of headliner

--

Lighting Systems Connector End Views

Mini Wedge (Door Jamb Switch), LF

Part of the left front door latch assembly

Power Door Systems Component Views in Doors

Lighting Systems Connector End Views

Mini Wedge (Door Jamb Switch), RF

Part of the right front door latch assembly

Power Door Systems Component Views in Doors

Lighting Systems Connector End Views

Mini Wedge (Door Jamb Switch), LR

Part of the left rear door latch assembly

Power Door Systems Component Views in Doors

Lighting Systems Connector End Views

Mini Wedge (Door Jamb Switch), RR

Part of the right rear door latch assembly

Power Door Systems Component Views in Doors

Lighting Systems Connector End Views

Power Door Lock Switch, LF

On the left door trim panel armrest

Power Door Systems Component Views in Doors

Power Door Systems Connector End Views in Doors

Power Door Lock Switch, RF

On the right front door trim panel armrest

Power Door Systems Component Views in Doors

Power Door Systems Connector End Views in Doors

Power Door Lock Switch, LR

On the left rear door trim panel armrest

Power Door Systems Component Views in Doors

Lighting Systems Connector End Views

Power Door Lock Switch, RR

On the right rear door trim panel armrest

Power Door Systems Component Views in Doors

Lighting Systems Connector End Views

Power Door Lock Switch (Rear Cargo)

In the right rear of vehicle near the D pillar

Power Door Systems Component Views in Doors

Lighting Systems Connector End Views

Power Mirror Switch

On the left door trim panel armrest

--

Lighting Systems Connector End Views

Power Window/Door Lock Switch, LF

On the left door trim panel armrest

Power Door Systems Component Views in Doors

Power Door Systems Connector End Views in Doors

Power Window/Door Lock Switch, RF

On the right front door trim panel armrest

Power Door Systems Component Views in Doors

Lighting Systems Connector End Views

Power Window/Door Lock Switch, LR

On the left rear door trim panel armrest

--

Lighting Systems Connector End Views

Power Window/Door Lock Switch, RR

On the right rear door trim panel armrest

--

Lighting Systems Connector End Views

Radio

In the center of the IP

Entertainment Component Views in Entertainment

Entertainment Connector End Views in Entertainment

Reading Lamps, Overhead Console

Part of the overhead console

Lighting Systems Component Views

Lighting Systems Connector End Views

Rear Lamps Bussing Block

In the front of the rear bumper on the crossmember

Lighting Systems Component Views

Lighting Systems Connector End Views

Rear Seat Audio (RSA)

Part of the rear console between the front seats

Entertainment Component Views in Entertainment

Entertainment Connector End Views in Entertainment

Roof Beacon Relay

Near the left lower B pillar

Electrical Center Identification Views in Wiring Systems

Lighting Systems Connector End Views

Roof Beacon Switch

At the center of the IP

Lighting Systems Component Views

Lighting Systems Connector End Views

Roof Marker Lamps

On the top of the roof

Lighting Systems Component Views

Lighting Systems Connector End Views

Selectable Ride Switch

In the center of the instrument panel

Selectable Ride Component Views in Selectable Ride

Selectable Ride Connector End Views in Selectable Ride

Stoplamp Switch

At the top of the brake pedal

Lighting Systems Component Views

Lighting Systems Connector End Views

Tail/Stop-Turn Lamp, RH

On the right rear of the vehicle

Lighting Systems Component Views

Lighting Systems Connector End Views

Tail/Stop-Turn Lamp, LH

On the left rear of the vehicle

Lighting Systems Component Views

Lighting Systems Connector End Views

Trailer Connector

At the rear of the vehicle at the rear bumper

Lighting Systems Component Views

Lighting Systems Connector End Views

Turn /Hazard Flasher

In the Fuse Block

Electrical Center Identification Views in Wiring Systems

Lighting Systems Connector End Views

Turn /Hazard Switch

Inside the steering column near the steering wheel

--

Lighting Systems Connector End Views

Underhood Lamp Assembly

On the underside of the hood

Lighting Systems Component Views

Lighting Systems Connector End Views

Vanity Mirror Light - RH

Part of visor on the headliner

--

Lighting Systems Connector End Views

Vanity Mirror Light - LH

Part of visor on the headliner

--

Lighting Systems Connector End Views

C125

At the left front of the engine compartment on the radiator support (Snowplow Package)

--

Inline Harness Connector End Views in Wiring Systems

C127

At the right front of the engine compartment on the radiator support (Snowplow Package)

--

Inline Harness Connector End Views in Wiring Systems

C198

On the left inner fender to the right of the Fuse Block

--

Inline Harness Connector End Views in Wiring Systems

C200

At the left kick panel next to the A pillar

Harness Routing Views in Wiring Systems

Inline Harness Connector End Views in Wiring Systems

C201A

On the steering column under the IP

Harness Routing Views in Wiring Systems

Inline Harness Connector End Views in Wiring Systems

C201C

On the steering column under the IP

Harness Routing Views in Wiring Systems

Inline Harness Connector End Views in Wiring Systems

C202

On the left side of the IP on the back of the cluster

Harness Routing Views in Wiring Systems

Inline Harness Connector End Views in Wiring Systems

C210

At the left A pillar near the kick panel

Harness Routing Views in Wiring Systems

Inline Harness Connector End Views in Wiring Systems

C251

In the right side in back of the IP compartment box

--

Inline Harness Connector End Views in Wiring Systems

C297

On the lower right side of the IP

--

Inline Harness Connector End Views in Wiring Systems

C297B

On the lower right side of the IP

--

Inline Harness Connector End Views in Wiring Systems

C297D

On the lower right side of the IP

--

Inline Harness Connector End Views in Wiring Systems

C299

At the right side of the IP at the kick panel

Harness Routing Views in Wiring Systems

Inline Harness Connector End Views in Wiring Systems

C310

Between the left rear door and the body

Harness Routing Views in Wiring Systems

Inline Harness Connector End Views in Wiring Systems

C395

In the right rear of vehicle near the D pillar

Harness Routing Views in Wiring Systems

Inline Harness Connector End Views in Wiring Systems

C396

Between the right rear door and the body

Harness Routing Views in Wiring Systems

Inline Harness Connector End Views in Wiring Systems

G100

On the left radiator support bracket

Power and Grounding Component Views in Wiring Systems

--

G102

On the right front of the engine block (4.3L)

--

--

G102

On the left front of the engine block (4.8L,5.3L,6.0L)

Power and Grounding Component Views in Wiring Systems

--

G200

On the right upper IP at the A pillar

Power and Grounding Component Views in Wiring Systems

--

G203

On the left upper IP at the A pillar

Power and Grounding Component Views in Wiring Systems

--

G305

Inside the passenger compartment on the left side at the B pillar

--

--

G306

Inside the passenger compartment on the right side at the B pillar

Power and Grounding Component Views in Wiring Systems

--

G401

On the spare tire hoist bracket

--

--

P100

At the left rear of the engine compartment in the front of the dash

Power and Grounding Component Views in Wiring Systems

--

P500

Between the left front door and the body

--

--

P501

In the left door to the outside mirror

--

--

P600

Between the right front door and the body

--

--

P700

Between the left rear door and the body

Power and Grounding Component Views in Wiring Systems

--

P800

Between the right rear door and the body

--

--

Splice Pack 203 (203)

On the top left side of the IP near the A pillar

Harness Routing Views in Wiring Systems

--

S100

In the forward lamp harness

--

--

S101

In the forward lamp harness

--

--

S102

In the engine harness

--

--

S200

In the engine harness

--

--

S305

In the headliner harness

--

--