Installation Procedure

Fig 1: Heated Oxygen Sensor (Position 2)

Courtesy of GENERAL MOTORS CORP.

NOTE: Refer to Heated Oxygen Sensor (HO2S) Resistance Learn Reset Notice in Cautions and Notices.

NOTE: Refer to Fastener Notice in Cautions and Notices.

IMPORTANT: A special anti-seize compound is used on the O2S threads. New service sensors should already have the compound applied to the threads. Coat the threads of a reused sensor with anti-seize compound GM P/N 12377953 or equivalent.

Install the O2S to the exhaust pipe.
Tighten: Use the J 39194 to tighten the O2S to 42 N.m (31 lb ft).
Connect the HO2S electrical connector to the HO2S electrical harness connector.
Install the HO2S electrical connector retaining clip to the HO2S electrical harness connector.
Lower the vehicle.