Installation Procedure

WARNING: This page is about a different variant/trim than selected.

IMPORTANT: A special anti-seize compound is used on the heated oxygen sensor threads. The compound consists of a liquid graphite and glass beads. The graphite will burn away, but the glass beads will remain, making the sensor easier to remove. New or service replacement sensors will have the compound applied to the threads. If a sensor is removed and is to be reinstalled, the threads must have an anti-seize compound applied prior to installation.

Fig 1: View Of HO2S

Courtesy of GENERAL MOTORS CORP.

If necessary, coat the threads of the HO2S with anti-seize compound Saturn P/N 21485279 or equivalent.

NOTE: Refer to Fastener Notice .

Using the J 39194-C , install the HO2S.
Tighten: Tighten the sensor to 42 N.m (31 lb ft).

Fig 2: Identifying Engine Harness Electrical Connectors

Courtesy of GENERAL MOTORS CORP.

If equipped with RPO M86, perform the following steps, connect the engine harness electrical connector (1) to the HO2S.
Install the CPA retainer (2).
Install the HO2S connector clip to the thermostat housing.

Fig 3: Identifying Engine Harness Electrical Connectors - Top Of Engine

Courtesy of GENERAL MOTORS CORP.

If equipped with RPO MN5, perform the following steps, connect the engine harness electrical connector (2) to the HO2S.
Install the CPA retainer.
Install the HO2S connector clip to the thermostat housing.

Fig 4: View Of Exhaust Manifold Heat Shield

Courtesy of GENERAL MOTORS CORP.

Install the exhaust manifold heat shield.
Install the exhaust manifold heat shield studs.
Tighten: Tighten the studs to 22 N.m (16 lb ft).