Sierra 1500 2WD V6-4.3L VIN X (2004)
Oxygen Sensor: Service and Repair
Heated Oxygen Sensor (HO2S) Replacement Bank 1 Sensor 2
HEATED OXYGEN SENSOR (HO2S) REPLACEMENT BANK 1 SENSOR 2
REMOVAL PROCEDURE
1. Raise and suitably support the vehicle. Refer to Vehicle Lifting.
2. Remove the heated oxygen sensor (HO2S) connector from the crossmember, if equipped with a manual transmission and 2-wheel drive (2WD).
3. Disconnect the connector position assurance (CPA) retainer.
NOTE: Refer to Heated Oxygen and Oxygen Sensor Notice in Service Precautions.
4. Disconnect the HO2S electrical connector from the harness (2).
5. Remove the HO2S connector from the crossmember, if equipped with a automatic transmission and 2WD.
6. Disconnect the CPA retainer.
7. Disconnect the HO2S electrical connector from the harness.
