Installation Procedure

NOTE: A special anti-seize compound is used on the HO2S threads. The compound consists of liquid graphite and glass beads. The graphite tends to burn away, but the glass beads remain, making the sensor easier to remove. New or service replacement sensors already have the compound applied to the threads. If the sensor is removed from an exhaust component and if for any reason the sensor is to be reinstalled, the threads must have anti-seize compound applied before reinstallation.

Fig 1: Removing/Installing HO2S

Courtesy of GENERAL MOTORS CORP.

If re-installing the old sensor, coat the threads with anti-seize compound P/N 12377953, or equivalent.

CAUTION: Refer to Fastener Caution .

Install the HO2S to the exhaust manifold.
Tighten: Tighten the sensor to 42 N.m (31 lb ft).

Fig 2: View Of HO2S Electrical Connector Clip & Ignition Coil Bracket

Courtesy of GENERAL MOTORS CORP.

Connect the HO2S electrical connector (2).
Install the CPA retainer (3).
Install the oxygen sensor electrical connector to the ignition coil bracket.