Installation Procedure

WARNING: This page is about a different car, the 2012 GMC Yukon, 2012 Chevrolet Tahoe, and 2012 Cadillac Escalade. However, it is still accessible from the selected car via links, so may be relevant.

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 the reinstallation.

Fig 1: View Of Exhaust Sensors

Courtesy of GENERAL MOTORS COMPANY

CAUTION:

Refer to Fastener Caution .

If reinstalling the old sensor, coat the threads with anti-seize compound GM P/N 12377953, or equivalent.
Install the HO2S (1).
Tighten

Tighten the sensor to 42 N.m (31 lb ft).

Fig 2: Locating HO2S & Components

Courtesy of GENERAL MOTORS COMPANY

Connect the engine wiring harness electrical connector (7) to the HO2S.
Install the engine wiring harness electrical connector clip (6) to the fuel line clip.
Install the CPA retainer (4).
Install the front propeller shaft to the front differential, if equipped with 4WD. Refer to Front Propeller Shaft Replacement .
Lower the vehicle.