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/Traction Control Module (EBTCM)

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) (L61)

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

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

Refer to Engine Controls Schematics in Engine Controls-2.2 L (L61)

Engine Control Module (ECM) (L81)

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

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

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

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

Power Steering Control Module (PSCM)

Refer to Steering Column Replacement in Steering Wheel and Column

Refer to Diagnostic System Check - Power Steering System in Power Steering System

Refer to Power Steering Schematics in Power Steering System

Transmission Control Module (TCM) (AF33-5)

Refer to Transmission Control Module Replacement in Automatic Transaxle AF33-5

Refer to Diagnostic System Check - Automatic Transmission in Automatic Transaxle AF33-5

Refer to Automatic Transmission Controls Schematics in Automatic Transaxle AF33-5

Transmission Control Module (TCM) (VT25-E)

Refer to Transmission Control Module Replacement in Automatic Transmission VT25-E

Refer to Diagnostic System Check - Automatic Transmission in Automatic Transmission VT25-E

Refer to Automatic Transmission Controls Schematics in Automatic Transmission VT25-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