K 3500 Truck 4WD V8-8.1L VIN G (2002)
28. If equipped with a 6.6L engine, remove the insulators from the muffler hangers.
29. With the aid of an assistant, slide the muffler rearward in order to separate the muffler from the exhaust muffler pipe.
30. Remove the insulators from the muffler hangers, if necessary.
31. Remove the exhaust muffler gasket, if necessary.
32. If equipped with a 6.0L or 8.1L engine, remove the oxygen sensor if the muffler is being replaced.
Installation Procedure
1. If equipped with a 6.0L or 8.1 L engine, and the muffler was replaced re-install the old oxygen sensor.
2. Apply anti-seize compound GM P/N 12377953 or equivalent to the threads of the old oxygen sensor.
Notice: Refer to Fastener Notice in Service Precautions.
3. Install the oxygen sensor.
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Tighten the sensor to 42 Nm (31 ft. lbs.).
