Escalade AWD V8-6.2L (2009)
1. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle (See: Maintenance/Vehicle Lifting/Service and Repair).
2. Remove the connector position assurance (CPA) retainer (4).
3. Disconnect the engine wiring harness electrical connector (4) from the HO2S electrical connector (3).
4. Remove the HO2S electrical connector clip from the engine harness clip (6).
Caution: Refer to Excessive Force and Oxygen Sensor Caution (See: Service Precautions/Excessive Force and Oxygen Sensor Caution).
5. Remove the HO2S (4).
Installation Procedure
Note: A special anti-seize compound is used on the 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 exhaust component and if for any reason the sensor is to be reinstalled, the threads must have anti-seize
compound applied before the reinstallation.
