Caution: Wear protective goggles and gloves in order to avoid serious personal injury when removing exhaust parts.

An accumulation of dirt and corrosion may make removing exhaust components difficult. A penetrating oil, used on the threads of U-bolts, may assist in the removal of these components.

Notice: Replacement of exhaust system parts must be OEM standard to ensure that the vehicle operates as designed.

Check for proper alignment when installing a new exhaust pipe/muffler or tailpipe, on any model. Misaligned parts usually cause rattles and noise vibrations in the exhaust system. When aligning the system, leave all nuts/bolts loose, until all parts are aligned. After properly aligning the system, tighten the nuts/bolts, working from the front to the rear of the vehicle. Replace all damaged exhaust system hangers, hanger brackets, and clamps, in order to maintain the exhaust system alignment.

Important: 

1. Refer to Oxygen Sensors in Engine Controls, when servicing the exhaust system requires removing and replacing the oxygen sensors.
2. Apply the GM P/N 9985020 sealer, or equivalent, to all slip-joint connections.
3. Replace the tailpipe when replacing the muffler.
4. Always use new nuts when installing the exhaust pipe to the exhaust manifold.
5. Before installing the new nuts, clean the exhaust manifold stud threads with a wire brush.