GM Service Manual Online
For 1990-2009 cars only
  1. Inspect the following components for cracked joints, broken welds, and corrosion damage, which could permit exhaust fumes to seep into the rear compartment or passenger compartment:
  2. • Inspect the exhaust pipes
    • Inspect the exhaust seals
    • Inspect the catalytic converters
    • Inspect the mufflers
    • Inspect the tailpipes
  3. Inspect the exhaust system, including the heat shields. The exhaust system must be free from the following conditions:
  4. • Leaks
    • Binding
    • Grounding
    • Excessive Vibration
  5. The following conditions usually cause conditions such as leaks, binding, grounding and excessive vibration:
  6. • Loose or damaged flange bolts
    • Loose or damaged exhaust seals
    • Loose or damaged heat shields
    • Loose or damaged brackets
    • Loose or damaged pipes
  7. Align and replace misaligned or damaged components, as necessary.