Automatic Level Control Module (ALC)

Refer to Automatic Level Control Sensor Replacement in Automatic Level Control

Refer to Diagnostic System Check - Automatic Level Control in Automatic Level Control

Refer to Automatic Level Control Schematics in Automatic Level Control

Body Control Module (BCM)

Refer to Body Control Module Replacement

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Refer to Body Control System Schematics

Cellular Communications (OnStar® VIU and Phone)

Refer to OnStar Reconfiguration in Cellular Communication

Refer to Diagnostic System Check - Cellular Communication in Cellular Communication

Refer to one of the following procedures in Cellular Communications:

Driver Seat Adjuster Memory Module

Refer to Memory Seat Control Module Replacement in Seats

Refer to Diagnostic System Check - Power Seat Systems in Seats

Refer to Memory Seats Schematics in Seats

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)

Refer to Engine Control Module Replacement in Engine Controls

Refer to Diagnostic System Check - Engine Controls in Engine Controls

Refer to Engine Controls Schematics in Engine Controls

Entertainment (Radio, IRC and Amplifier)

Refer to one of the following procedures in Entertainment:

Refer to Diagnostic System Check - Radio/Audio System in Entertainment

Refer to Radio/Audio System Schematics in Entertainment

Heating and A/C Control (HVAC)

Refer to HVAC Control Module Replacement in HVAC - Automatic

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

Refer to HVAC Schematics in HVAC - Automatic

Instrument Panel (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

Refer to Power Steering Control Module Replacement in Variable Effort Steering

Refer to Diagnostic System Check - Variable Effort Steering in Variable Effort Steering

Refer to Steering Assist Schematics in Variable Effort Steering

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

Sun Roof Actuator Module

Refer to Sunroof Actuator Replacement in Roof

Refer to Diagnostic System Check - Power Sunroof in Roof

Refer to Sunroof Schematics in Roof

Transmission Control Module (TCM)

Refer to Transmission Control Module Replacement in Automatic Transmission - 4L30-E

Refer to Powertrain On Board Diagnostic (OBD) System Check - Automatic Transmission in Automatic Transmission - 4L30-E

Refer to Automatic Transmission Controls Schematics in Automatic Transmission - 4L30-E

Vehicle Theft Deterrent (VTD)

Refer to Theft Deterrent Module Replacement in Theft Deterrent

Refer to Diagnostic System Check - Theft Deterrent in Theft Deterrent

Refer to Theft Deterrent System Schematics in Theft Deterrent