G6 V6-3.9L (2009)
Note: The HO2S may be difficult to remove when the engine temperature is less than 48°C (120°F). Excessive force may damage the threads in
the exhaust manifold.
4. Remove the HO2S using the J 39194-B .
Installation Procedure
Note: A special anti-seize compound is used on the HO2S 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 is to be reinstalled, the threads must have anti-seize compound applied
before the reinstallation.
1. Coat the threads of the HO2S with anti-seize compound GM P/N 12377953 or equivalent, if necessary.
Caution: Refer to Fastener Caution (See: Service Precautions/Vehicle Damage Warnings/Fastener Caution).
2. Install the HO2S. Tighten the sensor to 42 Nm (31 lb ft) using the J 39194-B .
