Conditions For Clearing MIL/DTC

WARNING: This page is about a different car, the 2003 Oldsmobile Bravada, 2003 GMC Envoy XL, 2003 GMC Envoy, and 2003 Chevrolet TrailBlazer. However, it is still accessible from the selected car via links, so may be relevant.

The PCM will turn OFF the MIL during the first trip in which the diagnostic has been run and passed.
The history DTC will clear when the PCM turns OFF the MIL.
The DTC can be cleared by using scan tool.