GM Service Manual Online
For 1990-2009 cars only

Exhaust Pipe Replacement LSJ

Tools Required

SA9168NE Exhaust and Tailpipe Cutter

Removal Procedure

Notice: Do not over-flex or damage the flex joint when moving the flex joint from the normal mounting position.

Important: A service exhaust muffler will be needed when replacing the exhaust extension pipe on an originally equipped, welded system.

  1. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.
  2. Support the exhaust muffler.

  3. Object Number: 1382254  Size: SH
  4. Cut the exhaust extension pipe just forward of the weld at the front of the exhaust muffler using the SA9168NE .
  5. Release the muffler insulator from the underbody hanger and remove the exhaust muffler.

  6. Object Number: 1388612  Size: SH
  7. Support the catalytic converter pipe.
  8. Remove the catalytic converter pipe-to-exhaust extension pipe nuts.
  9. Release the exhaust extension pipe insulators from the underbody hangers, and support the extension pipe.
  10. Separate the extension pipe from the converter pipe and remove the extension pipe from the vehicle.
  11. Clean the converter pipe flange surface of any remaining gasket material.

Installation Procedure


    Object Number: 1388612  Size: SH
  1. Install a NEW exhaust gasket to the service exhaust extension pipe. The gasket is designed to be retained to the flange by the flange studs.
  2. Notice: Refer to Fastener Notice in the Preface section.

  3. Install the catalytic converter pipe-to-exhaust extension pipe nuts.
  4. Tighten
    Tighten the nuts to 30 N·m (22 lb ft).

  5. Position the extension pipe to the vehicle.
  6. Connect the extension pipe to the converter pipe, and support the extension pipe.
  7. Install the exhaust extension pipe insulators to the underbody hangers.

  8. Object Number: 1382254  Size: SH
  9. Install the service muffler to the vehicle.

  10. Object Number: 1388612  Size: SH
  11. Slide the muffler inlet pipe over the extension pipe, then install the muffler insulator to the underbody hanger.
  12. 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.
  13. Align the muffler and tailpipe to the vehicle underbody and rear bumper fascia.
  14. While maintaining muffler positioning, tighten the exhaust clamp nuts.
  15. Tighten
    Tighten the nuts to 45 N·m (33 lb ft).

  16. Lower the vehicle.

Exhaust Pipe Replacement L61

Tools Required

SA9168NE Exhaust and Tailpipe Cutter

Removal Procedure

Notice: Do not over-flex or damage the flex joint when moving the flex joint from the normal mounting position.

Important: A service exhaust muffler will be needed when replacing the exhaust extension pipe on an originally equipped, welded system.

  1. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.
  2. Support the exhaust muffler.

  3. Object Number: 890537  Size: SH
  4. Cut the exhaust extension pipe just forward of the weld at the front of the exhaust muffler using the SA9168NE .
  5. Release the muffler insulator from the underbody hanger and remove the exhaust muffler.

  6. Object Number: 889724  Size: SH
  7. Support the catalytic converter pipe.
  8. Remove the catalytic converter pipe-to-exhaust extension pipe nuts.

  9. Object Number: 890535  Size: SH
  10. Release the exhaust extension pipe insulators from the underbody hangers, and support the extension pipe.
  11. Separate the extension pipe from the converter pipe and remove the extension pipe from the vehicle.
  12. Clean the converter pipe flange surface of any remaining gasket material.

Installation Procedure


    Object Number: 890535  Size: SH
  1. Install a NEW exhaust gasket to the service exhaust extension pipe. The gasket is designed to be retained to the flange by the flange studs.
  2. Position the extension pipe to the vehicle.
  3. Connect the extension pipe to the converter pipe, and support the extension pipe.
  4. Install the exhaust extension pipe insulators to the underbody hangers.
  5. Notice: Refer to Fastener Notice in the Preface section.


    Object Number: 889724  Size: SH
  6. Install the catalytic converter pipe-to-exhaust extension pipe nuts.
  7. Tighten
    Tighten the nuts to 30 N·m (22 lb ft).


    Object Number: 890536  Size: SH
  8. Install the service muffler to the vehicle.

  9. Object Number: 890538  Size: SH
  10. Slide the muffler inlet pipe over the extension pipe, then install the muffler insulator to the underbody hanger.
  11. 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.
  12. Align the muffler and tailpipe to the vehicle underbody and rear bumper fascia.
  13. While maintaining muffler positioning, tighten the exhaust clamp nuts.
  14. Tighten
    Tighten the nuts to 45 N·m (33 lb ft).

  15. Lower the vehicle.