Diagnostic Aids

WARNING: This page is about a different car, the 2009 GMC Sierra, 2009 GMC Cab & Chassis Sierra, 2009 Chevrolet Silverado, and 2009 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-U0299 .
An intermittent condition is likely to be caused by a short on the GMLAN serial data circuits. Use the DTC U0100-U0299 procedure in order to isolate an intermittent condition.