Express 1500 RWD V8-5.3L (2008)
Oxygen Sensor: Service and Repair
Heated Oxygen Sensor Replacement - Bank 2 Sensor 1
Heated Oxygen Sensor Replacement - Bank 2 Sensor 1
Tools Required
J 39194-B Oxygen Sensor Wrench
Removal Procedure
Caution: Refer to Vehicle Lifting Caution.
1. Raise the vehicle.
Notice: Refer to Heated Oxygen and Oxygen Sensor Notice.
2. Disconnect the connector (1) for the HO2S.
Notice: Refer to Excessive Force and Oxygen Sensor Notice.
3. Remove the HO2S (2) using a J 39194-B.
Installation Procedure
Important: A special anti-seize compound is used on the heated oxygen sensor (HO2S) threads. The compound consists of liquid graphite
and glass beads. The graphite tends to burn away, but the glass beads remain, making the sensor easier to remove. New, or service
replacement sensors already have the compound applied to the threads. If the sensor is removed from an engine and if for any reason the
sensor is to be reinstalled, the threads must have anti-seize compound applied before the reinstallation.
1. Coat the threads of the oxygen sensor with anti-seize compound GM P/N 5613695, if necessary.
Notice: Refer to Component Fastener Tightening Notice.
2. Install the HO2S (2) using a J 39194-B.
Tighten the sensor to 42 N.m (31 lb ft).
3. Connect the HO2S harness connector (1).
4. Lower the vehicle.
