Notice: Refer to Oxygen Sensor Notice in the Preface section.
Important: Removal of the oxygen sensor is easier when the engine temperature is above 48°C (120°F).
Notice: Refer to Component Fastener Tightening Notice in the Preface section.
Important: New oxygen sensors should have a special anti-seize compound already applied to the sensor threads. If you are installing the original sensor, apply anti-seize compound GM P/N 5613695 or equivalent to the sensor threads.
Tighten
Tighten the HO2S to 43 N·m (32 lb ft).