GM Service Manual Online
For 1990-2009 cars only

Exhaust Muffler Replacement Front

Removal Procedure


    Object Number: 1263673  Size: SH
  1. Disconnect the post converter heated oxygen sensor electrical connection, if equipped.
  2. Remove the nuts that secure the front muffler pipe to the main catalytic converter flange.
  3. Remove the gasket.
  4. Remove the rubber from the hanger welded to the front muffler pipe.

  5. Object Number: 1263675  Size: SH
  6. Remove the nuts that secure the front muffler pipe flange to the rear muffler pipe flange.
  7. Remove the gasket.
  8. Remove the front muffler pipe.
  9. Inspect the exhaust pipe and the front muffler box for holes, damage, open seams, or other deterioration that could permit exhaust fumes to seep into the passenger compartment or the trunk.

Installation Procedure


    Object Number: 1263675  Size: SH
  1. Install the front muffler pipe.
  2. Install the gasket.
  3. Notice: Refer to Fastener Notice in the Preface section.

  4. Install the nuts securing the front muffler pipe flange to the rear muffler pipe flange.
  5. Tighten
    Tighten the nuts to 30 N·m (22 lb ft).


    Object Number: 1263673  Size: SH
  6. Install the rubber to the hanger welded to the front muffler pipe.
  7. Install the gasket.
  8. Install the nuts securing the front muffler pipe to the main catalytic converter flange.
  9. Tighten
    Tighten the nuts to 30 N·m (22 lb ft).

  10. Connect the post converter heated oxygen sensor electrical connection, if equipped.
  11. Inspect the exhaust pipe and front muffler box for holes, damage, open seams, or other deterioration that could permit exhaust fumes to seep into the passenger compartment or the trunk.