GM Service Manual Online
For 1990-2009 cars only
  1. Inspect the following areas for cracks, stripped bolt heads, and rusted bolt threads:
  2. • Exhaust pipes
    • Seals
    • Three-way catalytic converters
    • Tail pipes
  3. Inspect the exhaust system for the following conditions:
  4. • Broken welds
    • Corrosion that would cause a leak
    • Cracked joints
  5. Inspect the following components:
  6. • Clamps
    • Brackets
    • Insulators
  7. The exhaust system, including the heat shields, must be free of the following conditions:
  8. • Leaks
    • Binding
    • Grounding
    • Excessive vibration
  9. If any of these conditions exist, check the exhaust system component alignment. Align as necessary. Replace as necessary.