Installation Procedure

Fig 1: Locating HO2S Sensor Electrical Connector (3.8L) Components

Courtesy of GENERAL MOTORS CORP.

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 P/N 12377953 or equivalent.

Install the HO2S (2) to the right exhaust manifold.
Tighten: Use the J 39194 to tighten the HO2S to 41 N. See Special Tools and Equipment .m (30 lb ft).
Install the HO2S electrical connector (4) to the bracket.
Connect the harness electrical connector (3) to the HO2S electrical connector (4).
Install the HO2S electrical connector retainer.
Install the fuel injector sight shield. Refer to Fuel Injector Sight Shield Replacement (L36) or Fuel Injector Sight Shield Replacement (L67) in Engine Mechanical 3.8L.