GM Service Manual Online
For 1990-2009 cars only

Name

Location

Locator View

Connector End View

Body Bussed Electrical Center (BBEC)

To the left 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

Body Control Module (BCM)

At the lower rear of the IP, on the heater

Body Control System Component Views in Body Control System

--

Body Control Module (BCM) Connector C1, (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, (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, (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

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

Door Lock Actuator, LH

Inside the door by the latches

Power Door Systems Component Views in Doors

--

Door Lock Cylinder Switch, LF (Utility)

Inside the door at the lock cylinder

Power Door Systems Component Views in Doors

--

Endgate Liftglass Relay

In the BBEC

Power and Grounding Component Views in Wiring Systems

--

Endgate Lock Cylinder Switch

At the top center of the endgate

Body Rear End Component Views

Body Rear End Connector End Views

Endgate Window Release Actuator

Inside the top of the endgate

Body Rear End Component Views

Body Rear End 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 Fuse Block

To the left of the IP, near the left front door jamb switch

Power and Grounding Component Views in Wiring Systems

Power and Grounding Connector End Views in Wiring Systems

Liftgate Ajar Jamb Switch

At the bottom center of the liftgate

Lighting Systems Component Views in Lighting Systems

Lighting Systems Connector End Views in Lighting Systems

Liftgate Lock Cylinder Switch

At the bottom center of the liftgate

Body Rear End Component Views

Body Rear End Connector End Views

Liftgate Window Release Actuator

At the bottom center of the liftgate liftglass

Body Rear End Component Views

Body Rear End Connector End Views

Park Brake Warning Switch

On the park brake bracket

Hydraulic Brake Component Views in Hydraulic Brakes

Hydraulic Brake Connector End Views in Hydraulic Brakes

Powertrain Control Module (PCM)

To the right of the engine compartment

Engine Controls Component Views in Engine Controls - 2.2L

--

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

To 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

Rear Wiper/Washer Switch And Endgate/Liftgate Window Release Switch

On the IP, to the left of the radio

Body Rear End Component Views

Body Rear End Connector End Views

Underhood Bussed Electrical Center (UBEC)

On the top of the left inner wheelwell

Power and Grounding Component Views in Wiring Systems

--

Underhood Bussed Electrical Center (UBEC) Connector C1 (68 Cavities) (4-door Utility Body harness)

In the UBEC

Power and Grounding Component Views in Wiring Systems

Power and Grounding Connector End Views in Wiring Systems

Underhood Bussed Electrical Center (UBEC) Connector C2 (68 Cavities)

Below the UBEC

Power and Grounding Component Views in Wiring Systems

Power and Grounding Connector End Views in Wiring Systems

Vehicle Control Module (VCM) (4.3L Engine)

To the right of the engine compartment

Engine Controls Component Views in Engine Controls - 4.3L

--

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

To the right 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)

At the engine harness to 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

C120 (5 Cavities)

At the 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

C203 (116 Cavities)

At the 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

C413 (6 Cavities) (Utility w/ Endgate)

At the body harness to endgate harness, to the rear left center of the body, at the endgate

Harness Routing Views in Wiring Systems

Inline Harness Connector End Views in Wiring Systems

C426 (8 Cavities) (Utility w/ Liftgate)

At the body harness to liftglass harness in-line connector, near the upper left corner of the liftgate

Harness Routing Views in Wiring Systems

Inline Harness Connector End Views in Wiring Systems

C428 (8 Cavities) (Utility w/ Liftgate)

At the body harness to liftgate harness, near the upper left corner of the liftgate

Harness Routing Views in Wiring Systems

Inline Harness Connector End Views in Wiring Systems

C501 (16 Cavities) (Utility)

At the body harness to left front door harness, in the left front door

Harness Routing Views in Wiring Systems

Inline Harness Connector End Views in Wiring Systems

G103 (2.2 L Engine)

(CKT 351) At the engine harness, to the right front of the engine block, under the generator

Power and Grounding Component Views in Wiring Systems

--

G103 (4.3 L Engine)

(CKT 351) At the engine harness, to the right rear of the cylinder head

Power and Grounding Component Views in Wiring Systems

--

G105 (2.2 L Engine)

(CKT 450, CKT 451) At the engine harness, to the right rear of the engine block, near the Ignition control module

Power and Grounding Component Views in Wiring Systems

--

G105 (4.3 L Engine)

(CKT 450, CKT 451) At the engine harness, to the left rear of the cylinder head

Power and Grounding Component Views in Wiring Systems

--

G200

(CKT 1850) At the body harness, to the left front of the IP, above P100

Power and Grounding Component Views in Wiring Systems

--

G201

(CKT 1850) At the body harness, to the left front of the IP, above P100

Power and Grounding Component Views in Wiring Systems

--

G203

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

Power and Grounding Component Views in Wiring Systems

--

G204

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

Power and Grounding Component Views in Wiring Systems

--

G420 (Utility)

(CKT 1450) At the body harness, in the right rear body corner, near C402 to the tail lamp harness

Power and Grounding Component Views in Wiring Systems

--

G450 (Utility)

(CKT 1350) At the body harness, in the left rear body corner, near C403 to the tail lamp harness

Power and Grounding Component Views in Wiring Systems

--

P100

At the IP bulkhead pass-through, to the left rear of the engine compartment, on the cowl

Harness Routing Views in Wiring Systems

--

P500

At the body harness to the left front door pass-through, between the body and the left front door

Harness Routing Views in Wiring Systems

--

P900 (Utility w/ Endgate)

At the body to endgate, between the body harness and the endgate

Harness Routing Views in Wiring Systems

--

P901 (Utility w/ Liftgate)

At the body to left liftgate harness, in the left of the liftgate

Harness Routing Views in Wiring Systems

--

P902 (Utility w/ Liftgate)

At the body to right liftgate harness, in the right of the liftgate

Harness Routing Views in Wiring Systems

--

S106 (2.2 L Engine)

(CKT 351) At the engine harness, between the breakouts to the PCM and to the fuel injector connector, 25 cm (9.8 in) from the breakouts to the PCM

Harness Routing Views in Wiring Systems

--

S106 (4.3 L Engine)

(CKT 351) At the engine harness, between the breakouts to the rear heated oxygen sensors connector and the body harness connector, 7 cm (2.75 in) from the breakout to the heated oxygen sensor connector

Harness Routing Views in Wiring Systems

--

S152 (2.2 L Engine)

(CKT 351, CKT 413, CKT 451) At the engine harness, between the breakouts for the left rear and the right rear engine block grounds, 15 cm (5.9 in) from the breakout to the left rear engine grounds

Harness Routing Views in Wiring Systems

--

S240 (Utility w/ Auto A/C)

(CKT 340) At the IP harness, 4 cm (1.57 in) from the breakout to the BCM module connector C3 and the breakout to the instrument cluster

Harness Routing Views in Wiring Systems

--

S240 (w/o Auto A/C)

(CKT 340) At the IP harness, 4 cm (1.57 in) from the breakout to the BCM module connector C3 and the breakout to the instrument cluster

Harness Routing Views in Wiring Systems

--

S427 (Utility)

(CKT 1350, CKT 1450) At the left rear body harness, 7 cm (2.75 in) below the breakout to the left tail lamp connector C403

Harness Routing Views in Wiring Systems

--

Splice Pack SP201

At the body harness, to the left of the IP, below the IP fuse block

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

--

--

Splice Pack SP203

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

Harness Routing Views in Wiring Systems

--