Installation Procedure

WARNING: This page is about a different car, the 2008 Pontiac G5 and 2008 Chevrolet Cobalt. However, it is still accessible from the selected car via links, so may be relevant.

IMPORTANT: A special anti-seize compound is used on the HO2S 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 sensors already have the compound applied to the threads. If the sensor is removed and is to be reinstalled, the threads must be coated with an anti-seize compound before reinstallation.

If reinstalling the old HO2S, coat the threads with anti-seize compound, GM P/N 12377953 or Saturn P/N 24185279, or equivalent.
Carefully install the HO2S to the pipe.

NOTE: Refer to Component Fastener Tightening Notice .

Using the J 39194 or equivalent, tighten the HO2S.
Tighten: Tighten the HO2S to 41 N.m (30 lb ft).
Install the HO2S electrical harness into position as noted before removal.

Fig 1: Locating HO2S Electrical Harness

Courtesy of GENERAL MOTORS CORP.

IMPORTANT: Use care when securing the HO2S electrical harness into the channel on the exhaust heat shield, to not pinch the wires.

Carefully bend the edge of the channel (1) on the LH side of the exhaust heat shield inboard, just enough to secure the HO2S electrical harness in the channel.

Fig 2: Locating HO2S (Position 2)

Courtesy of GENERAL MOTORS CORP.

Connect the HO2S electrical connector (2).
Install the wheel drive shaft heat shield. Refer to Wheel Drive Shaft Heat Shield Replacement .
Lower the vehicle.