Sierra Classic 1500 2WD V8-4.8L (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 (2).
4. If equipped with a 4.8L or 5.3L engine, connect the HO2S electrical connector (2).
5. If equipped with a fuel composition sensor, install the HO2S electrical connector to the fuel line clip.
6. Disconnect the CPA retainer.
7. If equipped, connect the fuel composition sensor electrical connector.
8. Lower the vehicle.