Diagnostic Aids

WARNING: This page is about a different car, the 2010 GMC Sierra, 2010 GMC Cab & Chassis Sierra, 2010 Chevrolet Silverado, and 2010 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.

Diagnosis of this DTC is accomplished via the symptom, DTC U0100-U02FF (with HP2) or DTC U0100-U02FF (without HP2) .
An intermittent condition is likely to be caused by a short on the GMLAN serial data circuits. Use the DTC U0100-U02FF (with HP2) or DTC U0100-U02FF (without HP2) procedure in order to isolate an intermittent condition.