GM Service Manual Online
For 1990-2009 cars only

Name

Location

Locator View

Connector End View

Backup Lamp Switch (w/ M50)

Left side of transmission

Lighting Systems Component Views

Lighting Systems Connector End Views

Backup Lamp Switch (w/ M30)

Part of park/neutral position switch, left side of transmission

Engine Electrical Component Views in Engine Electrical

Lighting Systems Connector End Views

Backup Lamp, LH

LR of the vehicle, in the tail lamp

Lighting Systems Component Views

Lighting Systems Connector End Views

Backup Lamp, RH

RR of the vehicle, in the tail lamp

Lighting Systems Component Views

Lighting Systems Connector End Views

Body Control Module (BCM)

Lower rear of the IP, on the heater

Body Control System Component Views in Body Control System

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

Lower rear of the IP, on the heater

Body Control System Component Views in Body Control System

Body Control System Connector End Views in Body Control System

Body Control Module (BCM) Connector C2 (LT BLU) (24 Cavities)

Lower rear of the IP, on the heater

Body Control System Component Views in Body Control System

Body Control System Connector End Views in Body Control System

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

Lower rear of the IP, on the heater

Body Control System Component Views in Body Control System

Body Control System Connector End Views in Body Control System

Body Relay Block

Left side of the dash, to the right of the IP fuse block

Power and Grounding Component Views in Wiring Systems

Power and Grounding Connector End Views in Wiring Systems

Courtesy Lamp, LH Console

Lower left of the IP

Lighting Systems Component Views

Lighting Systems Connector End Views

Courtesy Lamp, RH Console

Lower right of the IP

Lighting Systems Component Views

Lighting Systems Connector End Views

Courtesy Lamp Relay

In the body relay block

Power and Grounding Component Views in Wiring Systems

Electrical Center Identification Views in Wiring Systems

Data Link Connector (DLC)

Lower left of the IP

Data Link Communications Component Views in Data Link Communications

Data Link Communications Connector End Views in Data Link Communications

Daytime Running Lamps (DRL) Relay

In the underhood fuse block

Electrical Center Identification Views in Wiring Systems

Electrical Center Identification Views in Wiring Systems

Door Handle Switch, LH

Part of the door latch assembly

Lighting Systems Component Views

Lighting Systems Connector End Views

Door Lock and Side Window Switch, LH

In the left door trim panel, near the armrest

Power Door Systems Component Views in Doors

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Door Lock and Side Window Switch, LH Connector C1 (11 Cavities)

In the left door trim panel, near the armrest

Power Door Systems Component Views in Doors

Power Door Systems Connector End Views in Doors

Door Lock and Side Window Switch, RH

In the right door trim panel, near the armrest

Power Door Systems Component Views in Doors

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Door Lock and Side Window Switch, RH Connector C2 (3 Cavities)

In the right door trim panel, near the armrest

Power Door Systems Component Views in Doors

Power Door Systems Connector End Views in Doors

Hazard Warning Switch

Top of the steering column upper shroud

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

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Headlamp Ambient Light Sensor

Top right side of the IP

Lighting Systems Component Views

Lighting Systems Connector End Views

Headlamp Grounding Relay

In the underhood fuse block

Electrical Center Identification Views in Wiring Systems

Electrical Center Identification Views in Wiring Systems

Headlamp, LH High Beam

The inner headlamp bulb

Lighting Systems Component Views

Lighting Systems Connector End Views

Headlamp, LH Low Beam

The outer headlamp bulb

Lighting Systems Component Views

Lighting Systems Connector End Views

Headlamp, RH High Beam

The inner headlamp bulb

Lighting Systems Component Views

Lighting Systems Connector End Views

Headlamp, RH Low Beam

The outer headlamp bulb

Lighting Systems Component Views

Lighting Systems Connector End Views

Headlamp Low Beam Relay

In the underhood fuse block

Electrical Center Identification Views in Wiring Systems

Electrical Center Identification Views in Wiring Systems

Headlamp Power Relay

In the underhood fuse block

Electrical Center Identification Views in Wiring Systems

Electrical Center Identification Views in Wiring Systems

Headlamp Switch

LF of the IP

Lighting Systems Component Views

Lighting Systems Connector End Views

Heater and A/C Controller

In the center of the IP

HVAC Component Views in HVAC Systems - Manual

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Heater and A/C Controller (w/ Manual A/C) Connector C1 (10 Cavities) (Heater Control Lamp)

Bottom center connector

HVAC Component Views in HVAC Systems - Manual

HVAC Connector End Views in HVAC Systems - Manual

Heater and A/C Controller (w/ Manual A/C) Connector C5 (4 Cavities)

Between connectors C1 and C3

HVAC Component Views in HVAC Systems - Manual

HVAC Connector End Views in HVAC Systems - Manual

Heater Controller (Non-A/C)

In the center of the IP

HVAC Component Views in HVAC Systems - Manual

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Heater Controller Connector (Non- A/C) C1 (10 Cavities)

Upper center of the IP

HVAC Component Views in HVAC Systems - Manual

HVAC Connector End Views in HVAC Systems - Manual

High Mount Stop Lamp

Rear center top of the cab

Lighting Systems Component Views

Lighting Systems Connector End Views

High Mount Stop Lamp Relay

In the underhood fuse block

Electrical Center Identification Views in Wiring Systems

Electrical Center Identification Views in Wiring Systems

Inadvertent Power Lamp Relay

In the body relay block

Electrical Center Identification Views in Wiring Systems

Electrical Center Identification Views in Wiring Systems

Inside Rear View Mirror (w/ Map Lamps)

At the windshield centerline

Lighting Systems Component Views

Lighting Systems Connector End Views

Instrument Cluster

In the IP, ahead of 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

IP Ashtray Lamp

In the IP ashtray

Lighting Systems Component Views

Lighting Systems Connector End Views

IP Compartment Lamp

In the IP compartment

Lighting Systems Component Views

Lighting Systems Connector End Views

IP Dimmer Switch

Part of the headlamp switch

Lighting Systems Component Views

Lighting Systems Connector End Views

IP Fuse Block

LH of the IP, near the side door jamb switch

Power and Grounding Component Views in Wiring Systems

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Multifunction Switch (T/SIG, HDLP/ DM, & WSW)

Left side of the steering column

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

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Outside Rear View Mirror Switch

In the left door trim panel, beside the armrest

Power Door Systems Component Views in Doors

Power Door Systems Connector End Views in Doors

Park and Turn Signal Lamp, LH

In the headlamp, below the low beam bulb

Lighting Systems Component Views in Lighting Systems

Lighting Systems Connector End Views

Park and Turn Signal Lamp, LH Rear

LR of the vehicle, in the tail lamp

Lighting Systems Component Views in Lighting Systems

Lighting Systems Connector End Views

Park and Turn Signal Lamp, RH

In the headlamp, below the low beam bulb

Lighting Systems Component Views

Lighting Systems Connector End Views

Park and Turn Signal Lamp, RH Rear

RR of the vehicle, in the tail lamp

Lighting Systems Component Views

Lighting Systems Connector End Views

Park Brake Indicator Switch

On the park brake bracket

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

Park/Neutral Position and Backup Lamp Switch, Connector C1 (7 Cavities)

Left of the transmission

Shift Lock Control Component Views in Automatic Transmission

Shift Lock Control Connector End Views in Automatic Transmission

Radio

Center of the IP

Entertainment Component Views in Entertainment

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Radio Connector C1 (10 Cavities)

Center of the IP

Entertainment Component Views in Entertainment

Entertainment Connector End Views in Entertainment

Rear License Plate Lamp, LH

Left of the rear license plate

Lighting Systems Component Views in Lighting Systems

Lighting Systems Connector End Views

Rear License Plate Lamp, RH

Right of the rear license plate

Lighting Systems Component Views

Lighting Systems Connector End Views

Retained Accessory Power Relay

In the body relay block

Power and Grounding Component Views in Wiring Systems

Electrical Center Identification Views in Wiring Systems

Side Door Jamb Switch, LF

Left side of the IP

Body Control System Component Views in Body Control System

Body Control System Connector End Views in Body Control System

Side Door Jamb Switch, RF

Right side of the IP

Body Control System Component Views in Body Control System

Body Control System Connector End Views in Body Control System

Side Marker Lamp, LF

LF of the vehicle, the outer part of the headlamp

Lighting Systems Component Views

Lighting Systems Connector End Views

Side Marker Lamp, RF

RF of the vehicle, the outer part of the headlamp

Lighting Systems Component Views

Lighting Systems Connector End Views

Side Marker Lamp, LR

LR of the vehicle, in the tail lamp

Lighting Systems Component Views

Lighting Systems Connector End Views

Side Marker Lamp, RR

RR of the vehicle, in the tail lamp

Lighting Systems Component Views

Lighting Systems Connector End Views

Stop Lamp Switch

Mounted on the brake pedal

Lighting Systems Component Views

Lighting Systems Connector End Views

Transfer Case Shift Control Switch

Right of the instrument cluster

Transfer Case Control Component Views in Transfer Case - NVG 233 (NP1)

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Transfer Case Shift Control Switch Connector C2 (4 Cavities)

Right of the instrument cluster

Transfer Case Control Component Views in Transfer Case - NVG 233 (NP1)

Transfer Case Control Connector End Views in Transfer Case - NVG 233 (NP1)

Turn Signal Lamp 2/4 Flasher

Right side of the IP, mounted next to C203

Lighting Systems Component Views

Lighting Systems Connector End Views

Underhood Fuse Block

On the top of the left inner wheelwell

Power and Grounding Component Views in Wiring Systems

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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 C2 (68 Cavities) (Engine)

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 Lamp

LR of the engine compartment, on the hood

Lighting Systems Component Views

Lighting Systems Connector End Views

Visor Vanity Mirror Lamp, LH

In the left sunshade

Lighting Systems Component Views

Lighting Systems Connector End Views

Visor Vanity Mirror Lamp, RH

In the right sunshade

Lighting Systems Component Views

Lighting Systems Connector End Views

C203 (116 Cavities)

Body harness to IP harness, to the right 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 LF of the IP, at the LF window

Harness Routing Views in Wiring Systems

Inline Harness Connector End Views in Wiring Systems

C211 (48 Cavities)

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

Harness Routing Views in Wiring Systems

Inline Harness Connector End Views in Wiring Systems

C224 (4 Cavities)

Body harness to IP tray harness, in front of the IP, to the rear of the ashtray

Harness Routing Views in Wiring Systems

Inline Harness Connector End Views in Wiring Systems

C401 (5 Cavities)

In the rear, left side of the frame rail

Harness Routing Views in Wiring Systems

Inline Harness Connector End Views in Wiring Systems

C500 (22 Cavities) (w/ Power Locks/Windows)

Body harness to LF door harness, in the LF door

Harness Routing Views in Wiring Systems

Inline Harness Connector End Views in Wiring Systems

C601 (22 Cavities) (w/ Power Locks/Windows)

Body harness to RF door harness, in the RF door

Harness Routing Views in Wiring Systems

Inline Harness Connector End Views in Wiring Systems

G102 (2.2L)

(CKT 350) At the engine harness, RF of the engine block, under the generator

Harness Routing Views in Wiring Systems

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G102 (4.3L)

(CKT 350) Engine harness, RR of the cylinder head

Harness Routing Views in Wiring Systems

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G111

(CKT 150) Forward lamps harness, to the left of the radiator support, near SP100

Harness Routing Views in Wiring Systems

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G112

(CKT 250) Forward lamps harness, to the right inside of the radiator support, near SP101

Harness Routing Views in Wiring Systems

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G200

(CKT 1850) Body harness, to the LF of the IP, above P100

Harness Routing Views in Wiring Systems

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G201

(CKT 1850) Body harness, to the LF of the IP, above P100

Harness Routing Views in Wiring Systems

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G202

(CKT 1850) Body harness, to the LF of the IP, above P100

Harness Routing Views in Wiring Systems

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G203

(CKT 1050) Body harness, to the right of the IP, between C203 and the splice packs

Harness Routing Views in Wiring Systems

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G204

(CKT 1050) Body harness, to the right of the IP, between C203 and the splice packs

Harness Routing Views in Wiring Systems

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G205

(CKT 1050) Body harness, to the right of the IP, between C203 and the splice packs

Harness Routing Views in Wiring Systems

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G422

(CKT 2250) Chassis harness, in the rear of the right side frame rail

Harness Routing Views in Wiring Systems

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G475

(CKT 1750) Tail lamp harness, in the rear of the LH frame rail near SP402

Harness Routing Views in Wiring Systems

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P100

IP bulkhead pass-through, LR of the engine compartment, on the cowl

Harness Routing Views in Wiring Systems

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P500

Body harness to the LF door pass-through, between the body and the LF door

Harness Routing Views in Wiring Systems

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P600

Body harness to RF door pass-through, between the body and the RF door

Harness Routing Views in Wiring Systems

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S205

(CKT 1220) IP harness, between the breakouts for the radio and BCM connector C3, 8 cm (3.2 in) from the breakout to the radio

Harness Routing Views in Wiring Systems

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S208

(CKT 40) IP harness, between the breakouts to the radio and to the RH console courtesy lamp, 4 cm (1.6 in) from the breakout to the lamp

Harness Routing Views in Wiring Systems

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S283

(CKT 2409) IP harness, between the breakouts to the BCM connector C3 and the radio, 13 cm (5.2 in) from the breakout to the BCM

Harness Routing Views in Wiring Systems

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S300

(CKT 156) Dome harness, between the breakout to the dome lamp and to the LH visor vanity mirror lamp, 12 cm (4.7 in) from the breakout to the dome lamp

Harness Routing Views in Wiring Systems

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S302

(CKT 1850) Dome harness between the breakout to the dome lamp and to the LH visor vanity mirror lamp, 10 cm (3.9 in) from the breakout to the dome lamp

Harness Routing Views in Wiring Systems

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S332

(CKT 1732) Dome lamp harness, between the breakout to the dome lamp and to the LH visor vanity mirror lamp, 4 cm (1.6 in) from the breakout to the dome lamp

Harness Routing Views in Wiring Systems

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S502

(CKT 2409) LH door harness, between breakout to door speaker and door lock and side window switch

Harness Routing Views in Wiring Systems

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Splice Pack SP202

(CKT 379, CKT 1850) Strapped to the body harness, at the left center of the IP

Harness Routing Views in Wiring Systems

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Splice Pack SP203

(CKT 1050) IP harness, on the IP, in front of the ashtray, strapped to the body harness

Harness Routing Views in Wiring Systems

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Splice Pack SP204

(CKT 584, CKT 1414, CKT 1415, CKT 1050) Strapped to the body harness, in the center front of the IP, to the left of SP200

Harness Routing Views in Wiring Systems

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Splice Pack SP400

(CKT 1324, CKT 2509, CKT 2609) Tail lamp harness, on the center inside of the rear crossmember

Harness Routing Views in Wiring Systems

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Splice Pack SP401

(CKT 2250) Tail lamp harness, in the rear of the right side frame rail

Harness Routing Views in Wiring Systems

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Splice Pack SP402

(CKT 1750) Tail lamp harness, in the rear of the left side frame rail

Harness Routing Views in Wiring Systems

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