GM Service Manual Online
For 1990-2009 cars only

Removal Procedure


    Object Number: 747774  Size: SH
  1. Raise and suitably support the vehicle with safety stands. Refer to Lifting and Jacking the Vehicle in General Information.
  2. Remove the exhaust muffler nuts.

  3. Object Number: 747803  Size: SH
  4. Remove the exhaust muffler hanger brackets from the exhaust hanger insulators.
  5. With the aid of an assistant, slide the muffler rearward in order to remove the muffler from the catalytic converter.
  6. Remove and discard the exhaust muffler gasket.

Installation Procedure


    Object Number: 747803  Size: SH
  1. With the aid of an assistant, slide the muffler forward in order to install the muffler to the catalytic converter.
  2. Install the exhaust muffler hanger brackets to the exhaust hanger insulators.

  3. Object Number: 747774  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.

  4. Install the exhaust muffler nuts.
  5. Tighten
    Tighten the exhaust muffler nuts to 64 N·m (47 lb ft).

  6. Lower the vehicle.