Installation Procedure

NOTE: Refer to Component Fastener Tightening Notice in Cautions and Notices.

IMPORTANT: The new HO2S 1 comes with an anti-seize coating on the sensor threads. Take precautions in order to prevent the removal of any of the anti-seize coating prior to installation. If the sensor was removed and is being reinstalled, an anti-seize compound must be applied to the threads before installation.

Install HO2S 2 (1) into the exhaust pipe below the PUP-TWC (2).
Tighten: Tighten HO2S sensor to 45 N.m (32 lb ft).
Lower the vehicle.
Connect the HO2S 2 electrical connector.

Fig 1: Locating O2 Sensor

Courtesy of GENERAL MOTORS CORP.