Sierra 1500 2WD V8-5.3L Hybrid (2004)
Oxygen Sensor: Service and Repair
Heated Oxygen Sensor (HO2S) Replacement Bank 1 Sensor 1
HEATED OXYGEN SENSOR (HO2S) REPLACEMENT BANK 1 SENSOR 1
REMOVAL PROCEDURE
1. Raise and suitably support the vehicle. Refer to Vehicle Lifting.
2. If necessary, unbolt the front propeller shaft from the front differential. Refer to Propeller Shaft Replacement - Front in Propeller Shaft.
3. Disconnect the connector position assurance (CPA) retainer.
NOTE: Refer to Heated Oxygen and Oxygen Sensor Notice in Service Precautions.
4. Remove the heated oxygen sensor (HO2S) electrical connector from the fuel line clip.
5. If equipped with a 4.8L or 5.3L engine, disconnect the HO2S electrical connector (1).
6. If equipped with a 6.0L engine, disconnect the HO2S electrical connector (1).
