GM Service Manual Online
For 1990-2009 cars only

Control Module

Repair Instructions

Diagnostic System Check / Starting Point

Schematic

Body Control Module (BCM)

Refer to Body Control Module Replacement

Refer to Diagnostic Starting Point - Body Control System

Refer to Body Control System Schematics

Driver Information Center (DIC)

Refer to Driver Information Center Module Replacement in Instrument Panel, Gages and Console

Refer to Diagnostic Starting Point - Instrument Panel, Gages and Console in Instrument Panel, Gages and Console

Refer to Driver Information System Schematics in Instrument Panel, Gages and Console

Electronic Brake Control Module (EBCM)

Refer to Electronic Brake Control Module Replacement in Antilock Brake System

Refer to Diagnostic System Check - ABS in Antilock Brake System

Refer to Antilock Brake System Schematics in Antilock Brake System

Inflatable Restraint Sensing and Diagnostic Module (SDM)

Refer to Inflatable Restraint Sensing and Diagnostic Module Replacement in SIR

Refer to Diagnostic System Check - SIR in SIR

Refer to SIR Schematics in SIR

Instrument Panel Cluster (IPC)

Refer to Instrument Cluster Replacement in Instrument Panel, Gages and Console

Refer to Diagnostic System Check - Instrument Cluster in Instrument Panel, Gages and Console

Refer to Instrument Cluster Schematics in Instrument Panel, Gages and Console

Powertrain Control Module (PCM)

Refer to Powertrain Control Module Replacement in Engine Controls - 4.3L

Refer to Diagnostic System Check - Engine Controls in Engine Controls - 4.3L

Refer to Engine Controls Schematics in Engine Controls - 4.3L

Transfer Case Shift Control Module (TCSCM)

Refer to Transfer Case Shift Control Module Replacement in Transfer Case-NVG 136-NP4 (One Speed Automatic)

Refer to Diagnostic System Check - Transfer Case in Transfer Case-NVG 136-NP4 (One Speed Automatic)

Refer to Transfer Case Control Schematics in Transfer Case-NVG 136-NP4 (One Speed Automatic)