GM Service Manual Online
For 1990-2009 cars only

Tools Required

J 39194 Oxygen Sensor Wrench

Removal Procedure


    Object Number: 785786  Size: SH
  1. Disconnect the heated oxygen sensor connector (1) from the engine harness connector (2).
  2. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.
  3. Notice: Refer to Oxygen Sensor Notice in the Preface section.


    Object Number: 785779  Size: SH

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

  4. Remove the heated oxygen sensor using the J 39194 .

Installation Procedure

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


    Object Number: 785779  Size: SH

    Important: A special anti-seize compound is used on the oxygen sensor threads. The new service sensors should have the compound already applied to the threads. Coat the threads of a reused sensor with anti-seize compound GM P/N 5613695 or the equivalent.

  1. Install the heated oxygen sensor using the J 39194 .
  2. Tighten
    Tighten the heated oxygen sensor to 40 N·m (30 lb ft)

  3. Lower the vehicle.

  4. Object Number: 785786  Size: SH
  5. Connect the heated oxygen sensor connector (1) to the engine harness connector (2).