GM Service Manual Online
For 1990-2009 cars only

Removal Procedure

  1. Raise the vehicle.
  2. Support the muffler assembly.

  3. Object Number: 84636  Size: SH
  4. Remove the three nuts connecting the muffler assembly to the catalytic converter assembly.

  5. Object Number: 163857  Size: SH
  6. Remove the muffler assembly from the front hanger.

  7. Object Number: 163860  Size: SH
  8. Remove muffler assembly from rear hanger.

  9. Object Number: 163862  Size: SH
  10. Remove the muffler assembly from the tailpipe hanger.
  11. To aid in the removal of the muffler assembly, lubricate the rubber hangers with rubber lubricant GM P/N 12345884.
  12. Remove the muffler assembly from the vehicle.

Installation Procedure


    Object Number: 163862  Size: SH
  1. Install the muffler assembly into the vehicle.
  2. Connect the muffler assembly to the tailpipe hanger.

  3. Object Number: 163860  Size: SH
  4. Connect the muffler assembly to the rear hanger.

  5. Object Number: 163857  Size: SH
  6. Connect muffler assembly to the front hanger.

  7. Object Number: 84636  Size: SH
  8. Install the three nuts to connect the muffler assembly to the catalytic converter assembly.
  9. Tighten
    Tighten the nuts to 40 N·m (30 lb ft),

    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.