Removal Procedure

Fig 1: View Of O2 Sensor Harness Routing And Harness Mounting Brackets

Courtesy of GENERAL MOTORS CORP.

Raise and suitably support the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.
Disconnect the connector position assurance (CPA) retainer.
Remove the heated oxygen sensor (HO2S) from the clips
NOTE: Refer to Heated Oxygen and Oxygen Sensor Notice in Cautions and Notices.
If equipped with a 4.8L or 5.3L engine, disconnect the HO2S electrical connector.

Fig 2: View Of O2 Sensor, Connector, Harness And Retainers

Courtesy of GENERAL MOTORS CORP.

Fig 3: View Of Oxygen Sensors

Courtesy of GENERAL MOTORS CORP.

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