Sierra 1500 4WD V8-6.0L (2007)
5. Remove the HO2S (3).
Installation Procedure
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 sensor is to be reinstalled,
the threads must have anti-seize compound applied before the reinstallation.
1. If reinstalling the old sensor, coat the threads with anti-seize compound GM P/N 12377953, or equivalent.
Notice: Refer to Component Fastener Tightening Notice.
2. Install the HO2S (3).
Tighten the sensor to 42 N.m (31 lb ft).
