GM Service Manual Online
For 1990-2009 cars only

Exhaust Muffler Replacement L61

Removal Procedure

Important: The factory equipped welded extension pipe can be cut and reused when installing a service muffler, if the extension pipe is in acceptable condition.


    Object Number: 1382254  Size: SH
  1. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle .
  2. Locate and cut the extension pipe forward of the weld at the front of the muffler using an exhaust pipe cutter.
  3. Remove the muffler insulators from the muffler and remove the muffler.
  4. Clean and deburr the extension pipe end as necessary.

Installation Procedure

  1. Using a non petroleum product, lubricate the muffler insulators for ease of installation of the muffler.

  2. Object Number: 1382254  Size: SH
  3. Slide the muffler inlet pipe over the extension pipe, then install the muffler to the muffler insulators.

  4. Object Number: 1388782  Size: SH
  5. Install a service muffler clamp to the muffler inlet pipe. Position the clamp approximately 19 mm (¾ in), from the edge of the muffler inlet, with the clamp nuts oriented away from the evaporative emission (EVAP) canister.
  6. Align the muffler and tailpipe to the vehicle underbody and rear bumper fascia.
  7. Notice: Refer to Fastener Notice in the Preface section.

  8. While maintaining muffler positioning, tighten the service clamp nuts.
  9. Tighten
    Tighten the service clamp nuts to 45 N·m (33 lb ft).

  10. Lower the vehicle.
  11. Inspect for exhaust leaks.

Exhaust Muffler Replacement RPOs LE5/LSJ

Removal Procedure

Important: The factory equipped welded exhaust muffler pipe can be cut and reused when installing a service muffler, if the muffler pipe is in acceptable condition.


    Object Number: 1382254  Size: SH
  1. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle .
  2. Support the exhaust muffler.
  3. Cut the exhaust muffler pipe just forward of the weld at the front of the exhaust muffler using a suitable exhaust pipe cutter.
  4. Remove the muffler insulator from the underbody hanger and remove the exhaust muffler.
  5. Deburr the muffler pipe end as necessary.

Installation Procedure


    Object Number: 1382254  Size: SH
  1. Slide the muffler inlet pipe over the muffler pipe, then install the muffler insulator to the underbody hanger.

  2. Object Number: 1388782  Size: SH
  3. Install a service muffler clamp to the muffler inlet pipe. Position the clamp approximately 19 mm (¾ in), from the edge of the muffler inlet, with the clamp nuts oriented away from the evaporative emission (EVAP) canister.
  4. Align the muffler and tailpipe to the vehicle underbody and rear bumper fascia.
  5. Notice: Refer to Fastener Notice in the Preface section.

  6. While maintaining muffler positioning, tighten the exhaust clamp nuts.
  7. Tighten
    Tighten the nuts to 45 N·m (33 lb ft).

  8. Lower the vehicle.