Inspection/Maintenance Catalyst System Set Procedure: Description
WARNING: This page does not describe the selected car, but rather 7 other vehicles, including the 2001 Pontiac Grand Prix, 2001 Pontiac Bonneville, 2001 Chevrolet Monte Carlo, 2001 Chevrolet Impala, and 2001 Buick Regal. However, it is still accessible from the selected car via links, so may be relevant.
This test should satisfy enable criteria necessary to execute I/M readiness diagnostics for the catalyst system. Test may be used to set I/M SYSTEM STATUS indicators to YES.