Installation Procedure

Fig 1: HO2S Electrical Connector & Right Exhaust Manifold

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 oxygen sensor (1) 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 HO2S (2) to the right exhaust manifold.
Tighten: Use the J 39194 to tighten the HO2S to 42 N.m (31 lb ft).
Install the HO2S electrical connector (1) to the fuel injector sight shield bracket.
Connect the HO2S electrical connector (1).
Install the HO2S retaining clip.
Install the fuel injector sight shield. Refer to Fuel Injector Sight Shield Replacement (L26) or Fuel Injector Sight Shield Replacement (L32) in Engine Mechanical - 3.8L.