GM Service Manual Online
For 1990-2009 cars only

Name

Location

Locator View

Connector End View

Automatic Transfer Case (ATC) Control Module

To the left of the instrument cluster behind the headlamp switch

Transfer Case Control Component Views in Automatic Transfer Case

Transfer Case Control Connector End Views in Automatic Transfer Case

Body Control Module (BCM)

On the lower left side of the IP below the steering column

Body Control System Component Views in Body Control System

Body Control System Connector End Views in Body Control System

Data Link Connector (DLC)

On the left lower dash below the steering column

Data Link Communications Component Views in Wiring Systems

Data Link Communications Connector End Views in Wiring Systems

Electronic Brake Control Module (EBCM)

On the left side of the inner frame

Antilock Brake System Component Views in Antilock Brake System

Antilock Brake System Connector End Views in Antilock Brake System

Inflatable Restraint Sensing & Diagnostic Module

Under the driver seat

SIR Component Views in SIR

SIR Connector End Views in SIR

Instrument Cluster

On the left side of the IP above 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

Mid Bussed Electrical Center (MBEC)

Under the left side of the instrument panel near the left kick panel

Power and Grounding Component Views in Wiring Systems

Power and Grounding Connector End Views in Wiring Systems

Powertrain Control Module (PCM)

Near the left front inside the engine compartment

Engine Controls Component Views in Engine Controls - 4.8L, 5.3L, 6.0L

Engine Controls Connector End Views in Engine Controls - 4.8L, 5.3L, 6.0L

Underhood Bussed Electrical Center (UBEC)

At the left side of the engine compartment near the battery

Power and Grounding Component Views in Wiring Systems

Power and Grounding Connector End Views in Wiring Systems

Vehicle Control Module (VCM)

On the left front of the engine compartment

Engine Controls Component Views in Engine Controls - 4.3L

Engine Controls Connector End Views in Engine Controls - 4.3L

C100

Under the UBEC

Harness Routing Views in Wiring Systems

Inline Harness Connector End Views in Wiring Systems

C102

Under the UBEC

Harness Routing Views in Wiring Systems

Inline Harness Connector End Views in Wiring Systems

G103

On the right rear of the engine block

Power and Grounding Component Views in Wiring Systems

--

G203

On the left upper IP at the A pillar

Harness Routing Views in Wiring Systems

--

P100

At the left rear of the engine compartment in the front of the dash

Power and Grounding Component Views in Wiring Systems

--

SP205

On the left side of the IP behind the headlamp switch

Data Link Communications Component Views in Wiring Systems

Data Link Communications Connector End Views in Wiring Systems