Removal Procedure

NOTE: The oxygen sensor may be difficult to remove when the engine temperature is below 48° C (120° F). Excessive force may damage threads in the exhaust manifold or the exhaust pipe.

Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.
Remove the heated oxygen sensor (HO2S) electrical connector retaining clip from the HO2S electrical harness connector.
Disconnect the HO2S electrical connector from the HO2S electrical harness connector.

Fig 1: Heated Oxygen Sensor (Position 2)

Courtesy of GENERAL MOTORS CORP.

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

Use the J 39194 to remove the oxygen sensor from the exhaust pipe. See Special Tools and Equipment .