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 1492 (DTC INDEX)
2002 Chevrolet Avalanche 2500, RWD
Section 1492 (DTC Index)
2002 Chevrolet Avalanche 2500, RWDSECTION Section 1492 (DTC Index)
WARNING: This page is about a different car, the 2003 GMC Sierra, 2003 GMC Cab & Chassis Sierra, 2003 Chevrolet Silverado, and 2003 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
- Air Bag DTCS
- Anti-Lock Brake DTCS
- Automatic Transmission (4L60-E) DTCS
- Automatic Transmission (4L680-E) DTCS
- Automatic Transmission (ALLISON LCT 1000) DTCS
- Body Control Module DTCS
- Cellular Communication DTCS
- Charging DTCS
- Cruise Control DTCS
- Data Link Communication DTCS
- Defogger DTCS
- Engine Cooling DTCS
- Engine Performance - 4.3L DTCS
- Engine Performance - 4.8L, 5.3L & 6.0L DTCS
- Engine Performance - 6.0L Bi-Fuel & CNG DTCS
- Engine Performance - 6.6L DTCS
- Engine Performance - 8.1L DTCS
- Horn DTCS
- HVAC, Automatic DTCS
- HVAC, Manual DTCS
- Instrument Cluster DTCS
- Lighting DTCS
- Power Door Lock, Mirror & Window DTCS
- Power Seat DTCS
- Steering, Electronic - Rear Wheel DTCS
- Theft Deterrent DTCS
- Transfer Case (NVG 246-NP8) DTCS
- Transfer Case (NVG 263-NP1) DTCS
- Transmission, Manual (NV 3500) DTCS
- Transmission, Manual (NV 4500) DTCS
- Transmission, Manual (ZF S6-650) DTCS
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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.