Installation Procedure

Fig 1: Identifying Left Pre-Catalytic Converter Heated Oxygen Sensor (HO2S) Electrical Connector

Courtesy of GENERAL MOTORS CORP.

CAUTION:

A special anti-seize compound is used on the oxygen sensor 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 5613695 or equivalent.

Install the HO2S (2) to the right catalytic converter and tighten to 42 N.m (31 lb ft).
Connect the HO2S electrical connector (1).
Lower the vehicle.
Connect the battery negative cable. Refer to Battery Negative Cable Disconnection and Connection (Primary) , Battery Negative Cable Disconnection and Connection (Auxiliary) .