Conditions For Clearing DTC

WARNING: This page is about a different car, the 2002 GMC Sierra, 2002 GMC Cab & Chassis Sierra, 2002 Chevrolet Silverado, and 2002 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.

The conditions for setting DTC are no longer present.
A history DTC will clear after 40 malfunction free ignition cycles.
The Engine Control Module (ECM) receives the clear code command from the scan tool.