Using Accelerator Pedal
WARNING: This page is about a different car, the 2002 Chevrolet Monte Carlo, 2002 Chevrolet Impala, 2001 Chevrolet Monte Carlo, and 2001 Chevrolet Impala. However, it is still accessible from the selected car via links, so may be relevant.
Turn ignition switch to RUN position. Fully depress and release accelerator pedal 3 times within 5 seconds. If CHANGE ENGINE OIL message flashes, system is reset. If CHANGE ENGINE OIL message does not flash (remains illuminated), repeat resetting procedure.