GM Service Manual Online
For 1990-2009 cars only

Removal Procedure

Caution: Refer to Oxygen Sensor Caution in the Preface section.

Note: 

   • Remove oxygen sensors with the engine temperature above 48°C (120°F). Otherwise the oxygen sensors may be difficult to remove.
   • A special anti-seize compound is used on the oxygen sensor threads. New service sensors should already have the compound applied to the threads. Coat the threads of a reused sensor with anti-seize compound P/N 5613695 or equivalent.

  1. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle.

  2. Object Number: 927856  Size: SH
  3. Disconnect the forward oxygen sensor electrical connector.

  4. Object Number: 932128  Size: SH
  5. Remove the forward (1) oxygen sensor from the exhaust manifold.

Installation Procedure

    Caution: Refer to Fastener Caution in the Preface section.


    Object Number: 932128  Size: SH
  1. Install the heated oxygen sensor (HO2S) (1) in the exhaust manifold and tighten to 41 N·m (30 lb ft).

  2. Object Number: 927856  Size: SH
  3. Connect the oxygen sensor connector.
  4. Lower the vehicle.