Installing Exhaust Parts

NOTICE: When jacking or lifting the vehicle from the frame side rails, make sure the lift pads do not contact the catalytic converter as converter damage will result.

IMPORTANT:
^ Apply sealer GM P/N 9985020 or equivalent to all slip joint connections.
^ When installing the exhaust pipe to the engine manifold, always use a new seal and nuts. Clean the engine manifold stud threads with a wire brush before installing the new nuts.

When installing a new exhaust pipe, muffler, or tailpipe, on any model, check for proper alignment. When replacing the muffler/tailpipe assembly on vehicles with large block gas engines, the rear axle must be temporarily lowered in order to remove the assembly. Rattles and noise vibrations in the exhaust system are usually caused by the misalignment of parts. When aligning the system, leave all bolts and nuts loose until all parts are properly aligned. Tighten the exhaust system components starting with the flat flange, then the engine, and finally the U-bolts,if equipped.

Damaged exhaust system hangers, hanger brackets and clamps should be replaced to maintain exhaust system alignment.