The check engine light is on in my 2008 Chevrolet Avalanche, and the fault code displayed is U0102. This code is related to the 4-wheel drive system, causing the 4WD light to flash intermittently. The only diagnostic code retrieved so far is U0102. Can anyone provide insight into what this means or how to resolve it?
Code U010-than indicates a potential problem with the vehicle's four-wheel drive system. There is a Technical Service Bulletin (TSB) available for this issue. Multiple causes are possible, and specialized diagnostic equipment may be required. Check the transmission wiring harness and all connectors for damage or loose connections.
GM TSB Number: 08-07-30-021G. This bulletin addresses U0102 in 2008 Chevrolet Avalanche models. Search Google for this TSB to find detailed repair instructions and troubleshooting steps.
The issue occurs in a 2008 Chevy Avalanche LTZ with fault code U102.