GM Service Manual Online
For 1990-2009 cars only

Name

Location

Locator View

Connector End View

Ambient Light Sensor

At the top center of the instrument panel

Lighting Systems Component Views

Lighting Systems Connector End Views

Backup Lamp, LH

To the left rear of the vehicle, in the tail lamp

Lighting Systems Component Views

Lighting Systems Connector End Views

Backup Lamp, RH

In the right rear of the vehicle, in the tail lamp

Lighting Systems Component Views

Lighting Systems Connector End Views

Backup Lamp Switch (w/ M30)

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

Lighting Systems Component Views

Lighting Systems Connector End Views

Backup Lamp Switch (w/ M50)

LH side of transmission

Lighting Systems Component Views

Lighting Systems Connector End Views

Body Relay Block

LH of the dash, right 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) Connector C1, Brown(24 Cavities)

At the 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, Blue (24 Cavities)

At the 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, Purple (16 Cavities)

At the 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

Courtesy Lamp, LH Console

To the lower left of the IP

Lighting Systems Component Views

Lighting Systems Connector End Views

Courtesy Lamp, RH Console

To the lower right of the IP

Lighting Systems Component Views

Lighting Systems Connector End Views

Courtesy Lamp Relay

In the Body Relay Block

Lighting Systems Component Views

--

Daytime Running Lamps (DRL) Relay

In the Underhood Fuse Block

Lighting Systems Component Views

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Dome and High Mount Stop Lamp

At the center top of the rear cab

Lighting Systems Component Views

Lighting Systems Connector End Views

Fog Lamp, LH

LF of the vehicle

Lighting Systems Component Views

Lighting Systems Connector End Views

Fog Lamp, RH

RF of the vehicle

Lighting Systems Component Views

Lighting Systems Connector End Views

Fog Lamp Relay

In the Underhood Fuse Block

Lighting Systems Component Views

--

Fog Lamp Switch

LH of the IP, Part of the Headlamp Switch

Lighting Systems Component Views

Lighting Systems Connector End Views

Headlamp Dimmer Switch

Part of the headlamp switch

Lighting Systems Component Views

Lighting Systems Connector End Views

Headlamp Grounding Relay

In the Underhood Fuse Block

Lighting Systems Component Views

--

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 Power Relay

In the Underhood Fuse Block

Lighting Systems Component Views

--

Headlamp Switch

To the left front of the IP

Lighting Systems Component Views

Lighting Systems Connector End Views

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

At the upper center of the IP, the bottom center connector

HVAC Component Views in HVAC Systems with A/C - Manual

HVAC Connector End Views in HVAC Systems with A/C - Manual

Heater and A/C Controller (w/ Man A/C) Connector C5 (4 Cavities) (Except Base Pickup)

Between connectors C1 and C3

HVAC Component Views in HVAC Systems with A/C - Manual

HVAC Connector End Views in HVAC Systems with A/C - Manual

Heater Controller (w/o A/C) Connector C1

At the upper center of the IP

Heater Blower Controls Component Views in Heating and Ventilation (Non-A/C)

Heater Blower Controls Connector End Views in Heating and Venttilation (non-A/C)

High Beam Relay

In the Underhood Fuse Block

Power and Grounding Component Views in Wiring Systems

--

High Mounted Stop Lamp Relay

In the Underhood Fuse Block

Power and Grounding Component Views in Wiring Systems

--

Inadvertent Power Lamp Relay

In the Body Relay Block

Power and Grounding Component Views in Wiring Systems

--

Inside Rear View Mirror (w/ Map Lamps)

At the windshield centerline

Lighting Systems Component Views in Stationary Windows

Lighting Systems Connector End Views in Stationary Windows

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 Compartment Lamp

In the IP compartment

Lighting Systems Component Views

Lighting Systems Connector End Views

IP Fuse Block

LH of the IP, near the door jamb switch, LF

Power and Grounding Component Views in Wiring Systems

Power and Grounding Connector End Views in Wiring Systems

Multifunction Switch (T/SIG & HDLP D/SW & WSH & WSWA W/LVR)

LH side of the steering column

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

--

Park and Turn Signal Lamp, LH

In the headlamp, below the low beam bulb

Lighting Systems Component Views

Lighting Systems Connector End Views

Park and Turn Signal Lamp, LH Rear

LH rear of the vehicle, in the tail lamp

Lighting Systems Component Views

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

RH rear of the vehicle, in the tail lamp

Lighting Systems Component Views

Lighting Systems Connector End Views

Park Lamp Relay

In the Body Relay Block

Lighting Systems Component Views

--

Park/Neutral Position (PNP) Switch, Connector C1 (7 Cavities)

LH of the transmission

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

Tilt Wheel/Column Connector End Views in Steering Wheel and Column - Tilt

Radio Connector C1, (10 Cavities)

Center of 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

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

Side Marker Lamp, LH

LF of the vehicle, the outer part of the headlamp

Lighting Systems Component Views

Lighting Systems Connector End Views

Side Marker Lamp, RH

RF of the vehicle, the outer part of the headlamp

Lighting Systems Component Views

Lighting Systems Connector End Views

Side Marker Lamp, LH Rear

LH Rear of the vehicle, in the tail lamp

Lighting Systems Component Views

Lighting Systems Connector End Views

Side Marker Lamp, RH Rear

RH Rear of the vehicle, in the tail lamp

Lighting Systems Component Views

Lighting Systems Connector End Views

Sunshade Mirror Lamp, LH

In the LH sunshade

Lighting Systems Component Views

Lighting Systems Connector End Views

Sunshade Mirror Lamp, RH

In the RH sunshade

Lighting Systems Component Views

Lighting Systems Connector End Views

Supplemental Restraint System IP Module Switch

On the IP, to the left of the radio

SRS Component Views in SRS

SRS Connector End Views in SRS

TCC/Stop Lamp Switch

Mounted on the brake pedal

Lighting Systems Component Views

Lighting Systems Connector End Views

Transfer Case Select Switch Connector C1 (8 Cavities)

Right of the Instrument Panel Cluster

Transfer Case Control Component Views in Transfer Case

Transfer Case Control Connector End Views in Transfer Case

Turn Signal Lamp 2/4 Flasher

RH of the IP, mounted next to C203

Lighting Systems Component Views

Lighting Systems Connector End Views

Turn Signal Switch

Part of the multifunction switch

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

Tilt Wheel/Column Connector End Views in Steering Wheel and Column - Tilt

Underhood Fuse Block

On top of the left inner wheelwell

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 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 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

Underhood Lamp

LH Rear of the engine compartment, on the hood

Lighting Systems Component Views

Lighting Systems Connector End Views

C203 (116 Cavities)

Body harness to IP harness, to the RH 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

C401 (5 Cavities)

In the rear, LH of the frame rail

Harness Routing Views in Wiring Systems

Inline Harness Connector End Views in Wiring Systems

G102 (2.2L Engine)

On the engine harness, RH Front of the engine block, under the generator

Harness Routing Views in Wiring Systems

--

G102 (4.3L Engine)

On the engine harness, RH Rear of the cylinder head

Harness Routing Views in Wiring Systems

--

G111

(CKT 150) Forward Lamps harness, on the LH of the radiator support, near SP 100

Harness Routing Views in Wiring Systems

--

G112

(CKT 250) Forward Lamps harness, on the RH inside of the radiator support, near SP 101

Harness Routing Views in Wiring Systems

--

G200

(CKT 1850) Body harness, on the LH Front of the IP, above P 100

Harness Routing Views in Wiring Systems

--

G201

(CKT 1850) Body harness, on the LH Front of the IP, above P 100

Harness Routing Views in Wiring Systems

--

G202

(CKT 1850) Body harness, on the LH Front of the IP, above P 100

Harness Routing Views in Wiring Systems

--

G203

(CKT 1050) Body harness, on the RH of the IP, between C203 and the splice packs

Harness Routing Views in Wiring Systems

--

G204

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

Harness Routing Views in Wiring Systems

--

G205

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

Harness Routing Views in Wiring Systems

--

G422

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

Harness Routing Views in Wiring Systems

--

G475

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

Harness Routing Views in Wiring Systems

--

P100

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

Harness Routing Views in Wiring Systems

--

S205

(CKT 1220) IP harness, between the breakouts for the radio and BCM connector C3, 8 cm (3.14 in) from the breakout to the radio

Harness Routing Views in Wiring Systems

--

S208

(CKT 40) IP harness, between the breakouts for the radio and BCM connector C3, 8cm from the breakout to the radio

Harness Routing Views in Wiring Systems

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S300

(CKT 156) At the dome harness, between the breakout to the dome lamp and to the left sunshade mirror lamp, 12 cm (4.72 in) from the breakout to the dome lamp

Harness Routing Views in Wiring Systems

--

S302

(CKT 1850) Dome harness between the breakout to the dome lamp and to the LH sunshade mirror lamp, 5 cm (3.93 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 left sunshade mirror lamp, 4 cm (1.57 in) from the breakout to the dome lamp

Harness Routing Views in Wiring Systems

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Splice Pack SP100

(CKT 150) Forward lamp harness, to the LH Rear of the radiator support

Harness Routing Views in Wiring Systems

--

Splice Pack SP101

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

Harness Routing Views in Wiring Systems

--

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

--

Splice Pack SP203

(CKT 1050) IP harness behind the ashtray, strapped to the harness body

Harness Routing Views in Wiring Systems

--

Splice Pack SP204

(CKT 584, CKT 1414, CKT 1415, CKT 1050) Strapped to the body harness, near the center of the IP, left of SP 200

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 RH 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 LH frame rail

Harness Routing Views in Wiring Systems

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