Prior to Assembly

Installing Exhaust Parts
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.

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

Important:
^ Apply the GM P/N 9985020 sealer, or equivalent, to all slip-joint connections.
^ Replace the tailpipe when replacing the muffler.
^ Always use new nuts when installing the exhaust pipe to the exhaust manifold.
^ Before installing the new nuts, clean the exhaust manifold stud threads with a wire brush.