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 in Lighting Systems

Lighting Systems Connector End Views in Lighting Systems

Automatic Transmission Preference Switch (w/ Column Shift)

In the steering column

Automatic Transmission Electronic Component Views in Automatic Transmission

--

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

Body Control System Connector End Views

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

At the 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, Purple (16 Cavities)

At the 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

Lighting Systems Component Views in Lighting Systems

--

Data Link Connector (DLC)

To the lower left of the IP

Data Link Communications Component Views in Wiring Systems

Data Link Communications Connector End Views in Wiring Systems

Daytime Running Lamps (DRL) Relay

In the Underhood Fuse Block

Lighting Systems Component Views in Lighting Systems

--

Door Handle Switch, LH

Inside the door by the latches

Body Control System Component Views

Body Control System Connector End Views

Door Handle Switch, RH

Inside the door by the latches

Body Control System Component Views

Body Control System Connector End Views

Door Jamb Switch, LH

LH of the IP

Body Control System Component Views

Body Control System Connector End Views

Door Jamb Switch, RH

RH of the IP

Body Control System Component Views

Body Control System Connector End Views

Door Lock Cylinder Switch, LH

Inside the door at the lock cylinder

Power Door Systems Component Views in Doors

Power Door Systems Connector End Views in Doors

Door Lock Cylinder Switch, RH

Inside the door at the lock cylinder

Power Door Systems Component Views in Doors

Power Door Systems Connector End Views in Doors

Door Lock Relay

In the Body Relay Block

Power Door Systems Component Views in Doors

Power Door Systems Connector End Views in Doors

Door Unlock Relay

In the Body Relay Block

Power and Grounding Component Views in Wiring Systems

--

Headlamp Grounding Relay

In the Underhood Fuse Block

Lighting Systems Component Views in Lighting 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

Lighting Systems Component Views in Lighting Systems

--

Headlamp Switch

To the left front of the IP

Lighting Systems Component Views in Lighting Systems

Lighting Systems Connector End Views in Lighting Systems

Ignition Key Alarm Switch

At the ignition switch, part of the lock module

Audible Warnings Component Views in Instrument Panel, Gauges and Console

--

Inadvertent Power Lamp Relay

In the Body Relay Block

Power and Grounding Component Views in Wiring Systems

--

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

Park Brake Warning Switch

On the park brake bracket

Hydraulic Brake Component Views in Hydraulic Brakes

Hydraulic Brake Connector End Views in Hydraulic Brakes

Passlock Sensor

At the ignition switch, part of the lock module

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

--

Powertrain Control Module (PCM) Connector  C1 (2.2L Engine)

On the right of the engine compartment

Engine Controls Component Views in Engine Controls - 2.2L

Powertrain Control Module Connector End Views in Engine Controls - 2.2L

Powertrain Control Module (PCM) Connector  C2 (2.2L Engine)

On the right of the engine compartment

Engine Controls Component Views in Engine Controls - 2.2L

Powertrain Control Module Connector End Views in Engine Controls - 2.2L

Radio Connector C1, (10 Cavities)

Center of IP

Entertainment Component Views in Entertainment

Entertainment Connector End Views in Entertainment

Retained Accessory Power Relay

In the Body Relay Block

Retained Accessory Power (RAP) Component Views in Retained Accessory Power

--

Seat Belt Switch, LH

Under the LH seat

--

--

Seat Belt Switch, RH

Under the RH seat

--

--

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

Transfer Case Select Switch Connector C2 (4 Cavities)

Right of the Instrument Panel Cluster

Transfer Case Control Component Views in Transfer Case

Transfer Case Control Connector End Views in Transfer Case

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 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) (4.3L Engine)

RH of the engine compartment

Engine Controls Component Views in Engine Controls - 4.3L

--

Vehicle Control Module (VCM) (4.3L Engine) Connector C4 (24 Cavities)

RH of the engine compartment

Engine Controls Component Views in Engine Controls - 4.3L

VCM Connector End Views in Engine Controls - 4.3L

C101 (10 Cavities) (2.2L Engine)

Engine harness to body harness, to the right of the engine compartment, near the PCM

Harness Routing Views in Wiring Systems

Inline Harness Connector End Views in Wiring Systems

C101 (10 Cavities) (4.3L Engine)

Engine harness body harness, to the right of the engine compartment, near the VCM

Harness Routing Views in Wiring Systems

Inline Harness Connector End Views in Wiring Systems

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

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

C317 (6 Cavities)

Body harness to LF seat belt switch, under the left front seat

Harness Routing Views in Wiring Systems

Inline Harness Connector End Views in Wiring Systems

C500 (4 Cavities) (w/o Power Locks/Windows)

Body harness to the LF door harness, in the LF door

Harness Routing Views in Wiring Systems

Inline Harness Connector End Views in Wiring Systems

C500 (13 Cavities) (w/ Power Locks/Windows)

Body harness to the LF door harness, in the LF door

Harness Routing Views in Wiring Systems

Inline Harness Connector End Views in Wiring Systems

C601 (4 Cavities) (w/o Power Locks/Windows)

Body harness to the RF door harness, in the RF door

Harness Routing Views in Wiring Systems

Inline Harness Connector End Views in Wiring Systems

C601 (13 Cavities) (w/ Power Locks/Windows)

Body harness to the RF door harness, in the RF door

Harness Routing Views in Wiring Systems

Inline Harness Connector End 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

--

P100

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

Harness Routing Views in Wiring Systems

--

P500

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

Harness Routing Views in Wiring Systems

--

P600

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

Harness Routing Views in Wiring Systems

--

S282

(CKT 1382) IP harness, between the breakouts to the BCM connector C3 and the radio, 6 cm (2.36 in) from the breakout to the BCM

Harness Routing Views in Wiring Systems

--

S501

(CKT 1850) LH door harness, between the breakout to the door speaker and door lock and side window switch

Harness Routing Views in Wiring Systems

--

S601

(CKT 1050) RH door harness

Harness Routing Views in Wiring Systems

--

Splice Pack SP200

(CKT 41, CKT 241, CKT 341, CKT 817) Strapped to the body harness, in the center front of the IP, to the right of SP 204

Harness Routing Views in Wiring Systems

--

Splice Pack SP201

Body harness, to the left of the IP, below the IP Fuse Block, taped to the Body Harness

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

--