Silverado 3500 2WD V8-8.1L VIN G (2005)
22. Remove the insulators from the muffler hangers.
23. If equipped with a 6.0L or 8.1L engine, remove the oxygen sensor if the muffler is being replaced.
24. If the muffler is NOT being replaced as an assembly, the band clamp MUST be replaced. Perform the following:
1. Mark the position of the band clamp on the intermediate exhaust pipe.
2. Remove the band clamp from the exhaust pipe by grinding the weld.
3. Install a NEW band clamp onto the exhaust pipe.
Installation Procedure
1. If equipped with a 6.0L or 8.1L 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.
Tighten the sensor to 42 Nm (31 ft. lbs.).
4. If equipped with a 6.6L engine, install the insulators to the muffler hangers.
Important: Apply lubricant to the insulators to aid in installation.
5. Install a new exhaust muffler gasket.
6. With the aid of an assistant, slide the muffler forward in order to install the muffler to the exhaust muffler pipe.
7. Install the insulators to the frame hangers.
