C 3500 Truck 2WD V8-8.1L VIN G (2001)
Oxygen Sensor: Service and Repair
Heated Oxygen Sensor (HO2S) Replacement Bank 1 Sensor 2
NOTE: Refer to HO2S Pigtail Notice in Service Precautions.
Removal Procedure
IMPORTANT: The heated oxygen sensor may be difficult to remove when the engine temperature is below 48°C (120°F). Excessive force may
damage the threads in the exhaust manifold or exhaust pipe. It may be necessary to lower the exhaust system to gain sufficient access to a HO2S
and/or a HO2S connector.
1. Raise the vehicle. Refer to Lifting and Jacking the Vehicle.
2. Disconnect the HO2S electrical connector (1).
3. Carefully back out the heated oxygen sensor (3).
Installation Procedure
IMPORTANT: A special anti-seize compound is used on the heated oxygen sensor threads. The compound consists of graphite suspended in fluid
and glass beads. The graphite will burn away, but the glass beads will remain, making the sensor easier to remove. New or service sensors will already
have the compound applied to the threads. If a sensor is removed from an engine and if for any reason is to be reinstalled, the threads must have
anti-seize compound applied before reinstallation.
