GM Service Manual Online
For 1990-2009 cars only

Removal Procedure

  1. Turn the ignition OFF.
  2. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle.

  3. Object Number: 1201222  Size: SH
  4. Disconnect the heated oxygen sensor (HO2S) electrical connector (bank 1 shown, bank 2 similar).
  5. Remove the HO2S wiring harness from the transmission case.
  6. Notice: Refer to Oxygen Sensor Notice in the Preface section.


    Object Number: 1306432  Size: SH

    Important: Removal of the oxygen sensor is easier when the engine temperature is above 48°C (120°F).

  7. Remove the HO2S.

Installation Procedure

    Notice: Refer to Component Fastener Tightening Notice in the Preface section.


    Object Number: 1306432  Size: SH

    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.

  1. Install the HO2S.
  2. Tighten
    Tighten the HO2S to 43 N·m (32 lb ft).


    Object Number: 785791  Size: SH
  3. Connect the HO2S electrical connector (bank 1 shown, bank 2 similar).
  4. Install the HO2S wiring harness to the transmission case.
  5. Lower the vehicle.