Removal Procedure

WARNING: This page is about a different car, the 2007 GMC Sierra and 2007 Chevrolet 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 .

Fig 1: View Of Various Connectors & Clips

Courtesy of GENERAL MOTORS CORP.

Raise and suitably support the vehicle. Refer to Lifting and Jacking the Vehicle .
If vehicle is a 2-wheel drive (2WD) perform the following steps, otherwise proceed to step 5.
Disconnect the connector position assurance (CPA) retainer.
Disconnect the HO2S pigtail electrical connector (7) from the engine wiring harness electrical connector (6).

Fig 2: View Of Various Connectors & Clips

Courtesy of GENERAL MOTORS CORP.

If vehicle is a 4-wheel drive (4WD) perform the following steps, disconnect the CPA retainer.
Disconnect the engine wiring harness electrical connector (7) from the HO2S pigtail electrical connector (8).
Remove the HO2S pigtail electrical connector clip (9) from the fuel line bracket.

Fig 3: View Of HO2S

Courtesy of GENERAL MOTORS CORP.

Remove the HO2S (1).