Sierra 2500 4WD V8-6.0L (2008)
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 (4).
Tighten the sensor to 42 N.m (31 lb ft).
3. Connect the HO2S electrical connector to the engine wiring harness electrical connector (3).
4. Install the CPA retainer (1).
5. Lower the vehicle.
Heated Oxygen Sensor Replacement - Bank 1 Sensor 2 (2500 Series - Cab/Chassis)
Heated Oxygen Sensor Replacement - Bank 1 Sensor 2 (2500 Series - Cab/Chassis)
Removal Procedure
