K 1500 Yukon Denali AWD V8-6.0L VIN U (2002)
Oxygen Sensor: Service and Repair
Heated Oxygen Sensor (HO2S) Replacement Bank 1 Sensor 1
TOOLS REQUIRED
J 39194-B Oxygen Sensor Wrench
REMOVAL PROCEDURE
CAUTION: Refer to Vehicle Lifting Caution in Service Precautions.
1. Raise the vehicle.
NOTE: Refer to Heated Oxygen and Oxygen Sensor Notice in Service Precautions.
2. Disconnect the connector (1) for the HO2S.
NOTE: Refer to Excessive Force and Oxygen Sensor Notice in Service Precautions.
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.
