GM Service Manual Online
For 1990-2009 cars only

Removal Procedure

    Warning: Refer to Battery Disconnect Warning in the Preface section.


    Object Number: 1375345  Size: SH
  1. Disconnect the negative battery cable.
  2. Caution: Refer to Heated Oxygen and Oxygen Sensor Caution in the Preface section.

    Caution: Refer to Heated Oxygen Sensor Wire Repair Caution in the Preface section.

    Caution: Remove oxygen sensors with the engine temperature above 48°C (120°F). Otherwise the oxygen sensors may be difficult to remove.

  3. Disconnect the oxygen sensor (O2S) wiring harness connector.

  4. Object Number: 1375346  Size: SH
  5. Remove the O2S from the pup converter.

Installation Procedure


    Object Number: 1375347  Size: SH

    Note: A special anti-seize compound is used on the O2S threads. This compound consists of a liquid graphite and glass beads. The graphite will burn away, but the glass beads will remain, making the sensor easier to remove. New or service sensors will already have the compound applied to the threads. If a sensor is removed from any engine and if for any reason it is to be reinstalled, the threads must have anti-seize compound applied before reinstallation.

  1. Coat the threads of the oxygen sensor with an anti-seize compound, if needed.
  2. Caution: Refer to Fastener Caution in the Preface section.

  3. Install the oxygen sensor (O2S) and tighten to 39 N·m (29 lb ft).

  4. Object Number: 1375345  Size: SH
  5. Connect the O2S wiring harness connector.
  6. Connect the negative battery cable.