GM Service Manual Online
For 1990-2009 cars only

Name

Location

Locator View

Connector End View

Body Bussed Electrical Center (BBEC)

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

Compass Remote Sensor (w/ Short Console

Under the headliner, to the right of the overhead console

Driver Information System Components Views

--

Compass Remote Sensor (w/ Long Console

Internal to the Driver Information Display Module

Driver Information System Components Views

--

Driver Information Display Module  C1 (9 Cavities) (w/ Trip Computer)

Front overhead console, in the passenger compartment

Driver Information System Components Views

Driver Information Systems Connector End Views

Driver Information Display Module  C1 (6 Cavities) (w/o Trip Computer)

Front overhead console, in the passenger compartment

Driver Information System Components Views

Driver Information Systems Connector End Views

Driver Information Display Module  C2 (6 Cavities) (w/ Short Console)

Driver Information Display Module, Front overhead of the passenger compartment, to the compass remote sensor

Driver Information System Components Views

Driver Information 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

Ambient Air Temperature Sensor

Front center of the vehicle, left of the hood latch support

Driver Information System Components Views

Driver Information Systems 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) (Body)

Below 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) (Engine)

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)

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

Engine Controls Connector End Views in Engine Controls - 4.3L

C106 (4 Cavities)

Forward lamps to body harness, inside the LF fender near the UBEC

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

C209 (16 Cavities) (Pickup)

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

C209 (16 Cavities) (Utility)

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

G105 (2.2L Engine)

(CKT 450, CKT 451) Engine harness, to the RH rear of the engine block, near the Ignition Control Module

Harness Routing Views in Wiring Systems

--

G105 (4.3L Engine)

(CKT 450, CKT 451) Engine harness, LH Rear of the cylinder head

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

--

S152 (2.2L Engine)

(CKT 351, CKT 413, CKT 451) Engine harness, between the breakouts for the fuel injector connector and the Ignition Control Module, 7 cm (2.6 in) from G105

Harness Routing Views in Wiring Systems

--

S152 (4.3L Engine)

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

Harness Routing Views in Wiring Systems

--

S205

(CKT 1220) IP harness, between the breakouts for the radio and BCM connector C3, 8 cm (3.1 in) from the breakout to the radio

Harness Routing Views in Wiring Systems

--

S208 (w/o Auto A/C)

(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

--

S208 (w/ Auto A/C)

(CKT 40) IP harness, between the breakouts for the BCM connector C3 and the stereo radio, 6 cm (2.4 in) from the breakout to the BCM

Harness Routing Views in Wiring Systems

--

S290

(CKT 1301) IP harness, between the breakout to the BCM, C3, and In-line Connector C205

Harness Routing Views in Wiring Systems

--

S310 (Utility)

(CKT 40) On the dome lamp harness, 5 cm (2 in) from the sunshade mirror lamp, LH

Harness Routing Views in Wiring Systems

--

S390 (w/ Universal Garage Door Opener)

(CKT 1382) Dome lamp harness, in the breakout to the 5 cm (2 in) into the breakout

Harness Routing Views in Wiring Systems

--

S476 (Envoy only)

(CKT 1301) Body harness, 7 cm (2.6 in) from G450 breakout toward rear of vehicle

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 RH of SP204

Harness Routing Views in Wiring Systems

--