Removal Procedure
- Turn the ignition OFF.
- Remove the fuel injector sight shield, if necessary. Refer to
Fuel Injector Sight Shield Replacement .
- Raise and support the vehicle. Refer to
Lifting and Jacking the Vehicle .
- Disconnect the heated oxygen sensor (HO2S) electrical connector.
- Remove the HO2S electrical connector from the wiring harness bracket.
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).
- Remove the HO2S.
Installation Procedure
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.
- Install the HO2S.
Tighten
Tighten the HO2S to 43 N·m (32 lb ft).
- Install the HO2S electrical connector to the wiring harness bracket.
- Connect the HO2S electrical connector.
- Lower the vehicle.
- Install the fuel injector sight shield, if necessary. Refer to
Fuel Injector Sight Shield Replacement .