Conditions For Clearing DTC
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.
Current DTC clears when condition responsible for setting DTC no longer exists and a CLEAR DTC's command is issued via scan tool. History DTC will clear once 255 malfunction-free ignition cycles have occurred.