GM Service Manual Online
For 1990-2009 cars only

Removal Procedure

  1. Raise and suitably support the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.

  2. Object Number: 231131  Size: SH
  3. Remove the exhaust mufler pipe flange bolts.

  4. Object Number: 231156  Size: SH
  5. Remove the exhaust pipe hanger insulator retainers from the exhaust system.

  6. Object Number: 231159  Size: SH
  7. Remove the hanger insulators from the resonator.

  8. Object Number: 231151  Size: SH
  9. Remove the exhaust pipe hanger insulators from the mufflers.

  10. Object Number: 231153  Size: SH
  11. Remove the exhaust resonator clamps from the exhaust resonator.
  12. Separate the exhaust resonator from the exhaust muffler pipes.

Installation Procedure

  1. Install the exhaust resonator onto the exhaust muffler pipes.

  2. Object Number: 231151  Size: SH
  3. Install the exhaust pipe hanger insulators to the mufflers.

  4. Object Number: 231159  Size: SH
  5. Install the exhaust pipe hanger insulators to the resonator.
  6. Install the hanger insulator retainers to the support rods to the resonator and the mufflers.

  7. Object Number: 231131  Size: SH

    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.

  8. Install the exhaust mufler pipe flange bolts.
  9. Tighten
    Tighten the exhaust mufler pipe flange bolts to 40 N·m (30 lb ft).


    Object Number: 231153  Size: SH
  10. Install the exhaust resonator clamps.
  11. Tighten
    Tighten the exhaust resonator clamp nuts to 25 N·m (18 lb ft).

  12. Inspect all exhaust system clearances. Refer to Exhaust System Clearances .
  13. Start the engine and inspect the exhaust system for leaks.
  14. Lower the vehicle.