GM Service Manual Online
For 1990-2009 cars only

Exhaust Heat Shield Replacement Underbody

Removal Procedure

  1. Raise the vehicle on the hoist.
  2. Suitably support the vehicle.
  3. Remove the exhaust system, if necessary.
  4. Using a 1/4 inch drill, remove the rivets from the heat shields, as necessary.

  5. Object Number: 72778  Size: SH
  6. Remove the exhaust tailpipe heat shield from the vehicle.

  7. Object Number: 72779  Size: SH
  8. Remove the exhaust tailpipe heat shield from the vehicle.

  9. Object Number: 72781  Size: SH
  10. Remove the muffler heat shield.

  11. Object Number: 72783  Size: SH
  12. Remove the muffler heat shield.

  13. Object Number: 72785  Size: SH
  14. Remove the front exhaust pipe heat shield.

  15. Object Number: 72786  Size: SH
  16. Remove the front exhaust pipe heat shield.

Installation Procedure


    Object Number: 72786  Size: SH
  1. Install the front exhaust pipe heat shield on the vehicle.
  2. Install the rivets on the heat shield.

  3. Object Number: 72785  Size: SH
  4. Install the front exhaust pipe heat shield on the vehicle.
  5. Install the rivets on the heat shield.

  6. Object Number: 72783  Size: SH
  7. Install the muffler heat shield on the vehicle.
  8. Install the rivets on the heat shield.

  9. Object Number: 72781  Size: SH
  10. Install the muffler heat shield on the vehicle.
  11. Install the rivets on the heat shield.

  12. Object Number: 72779  Size: SH
  13. Install the exhaust tailpipe heat shield on the vehicle.
  14. Install the rivets on the heat shield.

  15. Object Number: 72778  Size: SH
  16. Install the exhaust tailpipe heat shield on the vehicle.
  17. Install the rivets on the heat shield.
  18. Install the exhaust system.
  19. Lower the vehicle.

Exhaust Heat Shield Replacement Frame

Removal Procedure

  1. Raise the vehicle on a hoist.
  2. Support the vehicle.
  3. Remove the exhaust system, as necessary.

  4. Object Number: 72787  Size: SH
  5. Remove the bolts retaining the heat shield.
  6. Remove the heat shield.

Installation Procedure


    Object Number: 72787  Size: SH
  1. Install the heat shield.
  2. Install the heat shield bolts.
  3. Tighten
    Tighten the heat shield retainer bolt to 12 N·m (106 lb in).

    Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.

  4. Install the exhaust system, as necessary.
  5. Lower the vehicle.