Removal Procedure

WARNING: This page is about a different car, the 2004 GMC Sierra, 2004 GMC Cab & Chassis Sierra, 2004 Chevrolet Silverado, and 2004 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.

NOTE: Refer to Heated Oxygen and Oxygen Sensor Notice in Cautions and Notices.

Raise and suitably support the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.
Disconnect the connector position assurance (CPA) retainer.
Disconnect the heated oxygen sensor (HO2S) electrical connector (1).

Fig 1: View Of Transmission & HO2S Sensor Electrical Connector
Courtesy of GENERAL MOTORS CORP.

Fig 2: Locating HO2S - Upstream

Courtesy of GENERAL MOTORS CORP.

Remove the HO2S (1).