GM Service Manual Online
For 1990-2009 cars only

Inspect the exhaust pipes, the catalytic converter(s), the muffler, and the tailpipe for the following conditions:

    • Cracked joints
    • Broken welds
    • Corrosion damage (Corrosion damage could cause leaks in the exhaust system.)

Inspect the clamps, the brackets, and the insulators for the following conditions:

    • Broken bolts
    • Stripped bolt threads
    • Corroded bolts

The exhaust system (including the heat shield) must be free of the following conditions:

    • Leaks
    • Binding
    • Grounding
    • Excessive vibration

These conditions may occur if any of the following components are loose or damaged:

    • Flange bolts or flange nuts
    • Heat shields
    • Brackets
    • Pipes

If any of these conditions exist, inspect the exhaust system alignment. Align and replace any components necessary, including new manifold seals, nuts, and gaskets.