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 648 (BODY CONTROL SYSTEM)
2002 Chevrolet Avalanche 2500, RWD
Section 648 (Body Control System)
2002 Chevrolet Avalanche 2500, RWDSECTION Section 648 (Body Control System)
WARNING: This page is about a different car, the 2002 Chevrolet Malibu. However, it is still accessible from the selected car via links, so may be relevant.
- Schematic and Routing Diagrams
- Component Locator
- Diagnostic Information and Procedures
- Diagnostic Starting Point-Body Control System
- Scan Tool Data List
- Scan Tool Data Definitions
- Diagnostic Trouble Code (DTC) List
- DTC B1000: Internal Write Malfunction
- DTC B1001: Module Is Not Configured Properly
- DTC B1009: EEPROM Check Sum Error Detection
- DTC B1369: Ignition 0 Input Is Inactive
- DTC B1374: Ignition 1 Input Is Inactive
- DTC B1379: Ignition 3 Input Is Inactive
- DTC U2000, U2001, U2002, U2003, U2004, U2005, U2006, U2007: Serial Data
- Control Module References
- Repair Instructions
- Description and Operation
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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.