Removal Procedure

WARNING: This page is about a different car, the 2006 Pontiac Montana SV6, 2006 Chevrolet Uplander, and 2006 Buick Terraza. However, it is still accessible from the selected car via links, so may be relevant.

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

Fig 1: Removing/Installing HO2S 1

Courtesy of GENERAL MOTORS CORP.

Disconnect the HO2S 1 harness connector.
Remove the HO2S 1 from the exhaust manifold.
Use the J 39194-B in order to carefully back out the heated oxygen sensor. See Special Tools .