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 1336 (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 2003 Saturn Vue. However, it is still accessible from the selected car via links, so may be relevant.
Control Module References
| Control Module | Repair | Diagnostic System Check | Schematic |
|---|---|---|---|
| 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 ABS Schematics in Antilock Brake System |
| Engine Control Module (ECM) (L61) | Refer to ENGINE CONTROL MODULE | Refer to DIAGNOSTIC SYSTEM CHECK -- ENGINE CONTROLS | |
| Engine Control Module (ECM) (L81) | Refer to ENGINE CONTROL MODULE | Refer to DIAGNOSTIC SYSTEM CHECK -- ENGINE CONTROLS | |
| Inflatable Restraint Sensing and Diagnostic Module (SDM) | Refer to SENSING & DIAGNOSTIC MODULE (SDM) | Refer to SIR DIAGNOSTIC SYSTEM CHECK | |
| Instrument Panel Cluster (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 |
| 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 System Schematics in Power Steering System |
| Transmission Control Module (TCM) (AF33-5) | Refer to Transmission Control Module (TCM) 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) | |||
| 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 |
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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.