Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSCHEVROLET2002AVALANCHE 2500, RWDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 972 (BODY CONTROL SYSTEM)DIAGNOSTIC INFORMATION AND PROCEDURESCONTROL MODULE REFERENCES
2002 Chevrolet Avalanche 2500, RWD
Control Module References
2002 Chevrolet Avalanche 2500, RWDSECTION Control Module References
WARNING: This page is about a different car, the 2004 Pontiac Aztek and 2004 Buick Rendezvous. However, it is still accessible from the selected car via links, so may be relevant.
Control Module References
| Control Module | Repair Instructions | Diagnostic System Check | Schematic |
|---|---|---|---|
| BCM | Refer to Body Control Module Replacement | - | Refer to Body Control System Schematics |
| DRR | Refer to DVD Player Replacement in Entertainment | Refer to Diagnostic System Check - Entertainment System in Entertainment | Refer to Radio/Audio System Schematics in Entertainment |
| EBCM | Refer to Electronic Brake Control Module Replacement in Antilock Brake System | Refer to Diagnostic System Check - ABS in Antilock Brake System | Refer to ABS Schematics in Antilock Brake System |
| HVAC | 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 |
| HUD | Refer to Head Up Display Replacement in Instrument Panel, Gages, and Console | Refer to Diagnostic System Check - Head Up Display in Instrument Panel, Gages, and Console | Refer to Head Up Display Schematics in Instrument Panel, Gages, and Console |
| IPC | Refer to Instrument Panel Cluster (IPC) 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 |
| MSM | Refer to Memory Seat Control Module Replacement in Seats | Refer to Diagnostic System Check - Power Seat Systems in Seats | Refer to Driver Seat Schematics in Seats |
| PASS-Key® Module | Refer to Theft Deterrent Control Module Replacement in Theft Deterrent | Refer to Diagnostic System Check - Theft Deterrent in Theft Deterrent | Refer to Theft Deterrent System Schematics in Theft Deterrent |
| PCM | Refer to Powertrain Control Module (PCM) Replacement in Engine Controls | Refer to Diagnostic System Check - Engine Controls in Engine Controls | Refer to Engine Controls Schematics in Engine Controls |
| Radio | Refer to Radio Replacement in Entertainment | Refer to Diagnostic System Check - Entertainment System in Entertainment | Refer to Radio/Audio System Schematics in Entertainment |
| RSE, DVD | Refer to DVD Player Replacement in Entertainment | Refer to Diagnostic System Check - Entertainment System in Entertainment | Refer to Video System Schematics in Entertainment |
| 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 |
| 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 |
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.