Suburban 3/4 Ton 4WD V8-6.0L VIN U (2004)
19. Remove the oxygen sensor if the muffler is being replaced.
20. If the muffler is NOT being replaced as an assembly, the band clamp MUST be replaced. Perform the following:
20.1.
Mark the position of the band clamp on the intermediate exhaust pipe.
20.2.
Remove the band clamp from the exhaust pipe by grinding the weld.
20.3.
Install a NEW band clamp onto the exhaust pipe.
Installation Procedure
1. If the muffler was replaced reinstall 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 oxygen sensor to 42 Nm (31 ft. lbs.).
