Sierra 1500 2WD V6-4.3L (2008)
Important: 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 old sensor is to be
reinstalled, the threads must have anti-seize compound applied before the reinstallation.
1. If reinstalling the old HO2S, coat the threads with anti-seize compound GM P/N 12377953, or equivalent.
Notice: Refer to Fastener Notice.
2. Install the HO2S (2).
Tighten the sensor to 42 N.m (31 lb ft).
3. Connect the HO2S pigtail electrical connector (5) to the engine wiring harness electrical connector (4).
4. Install the CPA retainer.
5. Lower the vehicle.
