G6 V6-3.9L (2009)
1. Install a NEW gasket to the catalytic converter studs.
2. Install the right (rear) catalytic converter (1).
Caution: Refer to Fastener Caution (See: Service Precautions/Vehicle Damage Warnings/Fastener Caution).
3. Install the left (front) catalytic converter to right (rear) catalytic converter nuts (2).
Tighten the nuts to 31 Nm (23 lb ft).
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 beads remain, making the sensor easier the 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 be have
anti-seize compound applied before the reinstallation.
4. If reinstalling the old HO2S, coat the threads with anti-seize compound GM P/N 12377953 or equivalent.
5. Install the HO2S (2) using the J 39194-B .
