GM Service Manual Online
For 1990-2009 cars only

Control Module

Repair

Diagnostic System Check

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

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

Engine Control Module (ECM) (L81)

Refer to Engine Control Module Replacement in Engine Controls-3.0L (L81)

Refer to Diagnostic System Check - Engine Controls in Engine Controls-3.0L (L81)

Refer to Engine Controls Schematics in Engine Controls-3.0L (L81)

HVAC Control Module

Refer to HVAC Control Module Replacement in HVAC Systems-Automatic

Refer to Diagnostic System Check - HVAC Systems - Automatic in HVAC Systems-Automatic

Refer to HVAC Schematics in HVAC Systems-Automatic

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) (L61)

Powertrain Control Module Replacement in Engine Controls-2.2L (L61)

Diagnostic System Check - Engine Controls in Engine Controls-2.2L (L61)

Engine Controls Schematics in Engine Control-2.2L (L61)

Transmission Control Module (TCM) (4T40-E/4T45-E)

Refer to Transmission Control Module Replacement in Automatic Transaxle - 4T40-E/4T45-E

Refer to Diagnostic System Check - Automatic Transmission in Automatic Transaxle - 4T40-E/4T45-E

Refer to Automatic Transmission Controls Schematics in Automatic Transaxle - 4T40-E/4T45-E

Vehicle Communication Interface Module (VCIM)

Refer to Communication Interface Module Replacement in Cellular Communication

Refer to Diagnostic System Check - Cellular Communication in Cellular Communication

Refer to OnStar Schematics in Cellular Communication