LaCrosse V6-3.6L (2007)
Oxygen Sensor: Service and Repair
Heated Oxygen Sensor 2 Replacement
Heated Oxygen Sensor 2 Replacement
Removal Procedure
Notice: The Heated Oxygen Sensor (HO2S) and the Oxygen Sensor use a permanently attached pigtail and connector. Do not remove this pigtail from
the Heated Oxygen Sensor. Damage or the removal of the pigtail or the connector could affect the proper operation of the sensor.
Take care when handling the HO2S and the O2S. Keep the in-line electrical connector and the louvered end free of grease, dirt, or other contaminants.
Also avoid using cleaning solvents of any type. Do not drop the HO2S or the O2S. Do not roughly handle the HO2S or the O2S.
1. Raise and support the vehicle. Refer to Vehicle Lifting.
2. Disconnect the heated oxygen sensor (HO2S) electrical connector.
Notice: The use of excessive force may damage the threads in the exhaust manifold/pipe.
Important: If the engine temperature is not above 48°C (120°F), the oxygen sensor will be difficult to remove.
3. Remove the HO2S.
Installation Procedure
Notice: Refer to Fastener Notice in Service Precautions.
Notice: A special anti-seize compound is used on the oxygen sensor threads. New service sensors should already have the compound applied to
the threads. Coat the threads of a reused sensor with anti-seize compound P/N 5613695 or equivalent.
