Installation Procedure
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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.
- If reinstalling the old sensor, coat the threads with anti-seize compound GM P/N 12377953, or equivalent.
- Install the HO2S (3) and tighten to 42 N.m (31 lb ft).
- Install the HO2S electrical connector clip to the engine harness clip (4).
- Connect the engine wiring harness electrical connector (2) to the HO2S electrical connector.
- Install the CPA retainer (3).
- Lower the vehicle.
CAUTION:
Refer to Component Fastener Tightening Caution .