Installation Procedure

IMPORTANT: A special anti-seize compound is used on the HO2S 2 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 is to be reinstalled, the threads must have anti-seize compound applied before reinstallation.

Coat the threads of the HO2S 2 with anti-seize compound GM P/N 12377953 or an equivalent, if necessary.

NOTE: Refer to Fastener Notice in Cautions and Notices.

Install the HO2S 2.
Tighten: Use the J 39194-B to tighten the sensor to 41 N.m (30 lb ft). See Special Tools and Equipment .
Connect the H02S 2 electrical connector.
Lower the vehicle.

Fig 1: View Of HO2S 2

Courtesy of GENERAL MOTORS CORP.