GM Service Manual Online
For 1990-2009 cars only

System

DTCs Required to Set System Status to YES

Catalyst

DTC P0420

EVAP

DTC P0440

DTC P0442

DTC P0446

DTC P1441

Oxygen Sensor

DTC P0133

DTC P0140

DTC P1133

Oxygen Sensor Heater

DTC P0135 or P0141