Installation Procedure

Fig 1: Identifying HO2S Electrical Connector

Courtesy of GENERAL MOTORS CORP.

IMPORTANT: A special anti seize compound is used on the heated oxygen sensor threads. The compound consists of graphite suspended in fluid and glass beads. The graphite will burn away, but the glass beads will remain, making the sensor easier to remove. New or service sensors will already have the compound applied to the threads. If a sensor is removed from an engine and if for any reason is to be reinstalled, the threads must have anti seize compound applied before reinstallation.

Coat the threads of heated oxygen sensor/catalyst monitor with anti seize compound P/N 12377953, or equivalent if necessary.

NOTE: Refer to Fastener Notice in Cautions and Notices.

Install the heated oxygen sensor (HO2S).
Tighten: Use the J 39194-B to tighten the sensor to 42 N.m (31 lb ft).
Connect the HO2S electrical connector.