Sierra Classic 2500 4WD V8-6.0L (2007)
1. If reinstalling the old sensor, coat the threads with anti-seize compound GM P/N 12377953, or equivalent.
NOTE: Refer to Component Fastener Tightening Notice.
2. Install the HO2S.
Tighten the sensor to 42 N.m (31 lb ft).
3. If equipped with a 6.0L engine, connect the HO2S electrical connector.
4. If equipped with a 4.8L or 5.3L engine, connect the HO2S electrical connector.
5. Install the HO2S connector clip to the frame.
6. Disconnect the CPA retainer.
7. Lower the vehicle.
