GM Service Manual Online
For 1990-2009 cars only

Control Module

Repair Instructions

Diagnostic System Check

Schematics

Body Control Module

Refer to Body Control Module Replacement

Refer to Diagnostic Starting Point - Body Control System

Refer to Body Control System Schematics

Driver Information Center

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

Refer to Diagnostic System Check - Driver Information Systems in Instrument Panel, Gages and Console

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

Electronic Brake Control Module

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

HVAC Control Module

Refer to HVAC Control Module Replacement in HVAC - Automatic Systems

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

Refer to HVAC Schematics in HVAC - Automatic Systems

Inflatable Restraint Sensing and Diagnostic Module

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

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

Memory Seat Module

Refer to Memory Seat Control Module Replacement in Seats

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Refer to Memory Seats Schematics in Seats

Powertrain Control Module

Refer to

    •  Powertrain Control Module Replacement in Engine Controls 4.8L, 5.3L, and 6.0L
    •  Engine Control Module Replacement in Engine Controls 6.6L
    •  Powertrain Control Module Replacement in Engine Controls 8.1L

Refer to

    •  Diagnostic System Check - Engine Controls in Engine Controls 4.8L, 5.3L, and 6.0L
    •  Diagnostic System Check - Engine Controls in Engine Controls 6.6L
    •  Diagnostic System Check - Engine Controls in Engine Controls 8.1L

Refer to

    •  Engine Controls Schematics in Engine Controls 4.8L, 5.3L, and 6.0L
    •  Engine Controls Schematics in Engine Controls 6.6L
    •  Engine Controls Schematics in Engine Controls 8.1L

Rear Wheel Steering Control Module

Refer to

Rear Wheel Steering Control Module Replacement

in Steering

Refer to

Diagnostic System Check - Rear Wheel Steering

in Steering

Refer to

Rear Wheel Steering Schematics

in Steering

Transfer Case Shift Control Module

Refer to

    •  Transfer Case Shift Control Module Replacement in Transfer Case - NVG 236/246 - NP8 (Two Speed Automatic)
    •  Transfer Case Shift Control Module Replacement in Transfer Case - NVG 263/NP1 (Selectable)

Refer to

    •  Diagnostic System Check - Transfer Case in Transfer Case - NVG 236/246 - NP8 (Two Speed Automatic)
    •  Diagnostic System Check - Transfer Case in Transfer Case - NVG 263/NP1 (Selectable)

Refer to

    •  Transfer Case Control Schematics in Transfer Case - NVG 236/246 - NP8 (Two Speed Automatic)
    •  Transfer Case Control Schematics in Transfer Case - NVG 263/NP1 (Selectable)

Transmission Control Module

Refer to

Transmission Control Module Replacement in Allison™ Automatic Transmission

Refer to

Diagnostic System Check - Automatic Transmission in Allison™ Automatic Transmission

Refer to

Automatic Transmission Controls Schematics in Allison™ Automatic Transmission

Vehicle Interface Unit

Refer to

    •  OnStar Vehicle Interface Unit Replacement in Cellular Communications

Refer to Diagnostic System Check - Cellular Communication in Cellular Communications

Refer to OnStar Schematics in Cellular Communications