GM Service Manual Online
For 1990-2009 cars only

Control Module

Repair Instructions

Diagnostic System Check

Schematic

Body Control Module (BCM)

Refer to Body Control Module Replacement

Refer to Diagnostic System Check - Body Control System

Refer to Body Control System Schematics

Driver Information Display Module

Refer to Driver Information Center Module Replacement

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Refer to Driver Information System Schematics

Driver Seat Adjuster Memory Module

Refer to Memory Seat Control Module Replacement

Refer to Diagnostic System Check - Power Seat Systems

Refer to Memory Seats Schematics

Electronic Brake Control Module (EBCM 310)

Refer to Electronic Brake Control Module Replacement

Refer to Diagnostic System Check

Refer to Antilock Brake System Schematics

Electronic Brake Control Module (EBCM 325)

Refer to Electronic Brake Control Module Replacement

Refer to Diagnostic System Check

Refer to Antilock Brake System Schematics

Electronic Climate Control (ECC) Module

Refer to Control Assembly Replacement

Refer to Diagnostic System Check

Refer to HVAC Blower Control Schematics

Inflatable Restraint Sensing and Diagnostic Module (SDM)

Refer to Inflatable Restraint Sensing and Diagnostic Module Replacement

Refer to Diagnostic System Check - SIR

Refer to SIR Schematics

Instument Cluster

Refer to Instrument Cluster Replacement

Refer to Diagnostic System Check - Instrument Cluster

Refer to Instrument Cluster: Analog Schematics

Powertrain Control Module (PCM) (2.2L)

Refer to Powertrain Control Module Replacement/Programming

Refer to Powertrain On Board Diagnostic (OBD) System Check

Refer to Engine Controls Schematics

Vehicle Control Module (VCM) (4.3L)

Refer to VCM Replacement/Programming

Refer to Powertrain On Board Diagnostic (OBD) System Check

Refer to Engine Controls Schematics

Transfer Case Shift Control Module (NP1)

Refer to Transfer Case Shift Control Module Replacement

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Refer to Transfer Case Control Schematics

Transfer Case Shift Control Module (NP4)

Refer to Transfer Case Shift Control Module Replacement

Refer to Diagnostic System Check

Refer to Transfer Case Control Schematics

Transfer Case Shift Control Module (NP8)

Refer to Transfer Case Shift Control Module Replacement

Refer to Diagnostic System Check

Refer to Transfer Case Control Schematics

Vehicle Interface Unit (VIU)

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Refer to OnStar Schematics