GM Service Manual Online
For 1990-2009 cars only

Exhaust Muffler Replacement Gasoline Engine Front

Removal Procedure


    Object Number: 1289564  Size: SH
  1. Remove the nuts and the gasket from the front muffler pipe to the exhaust front pipe flange.
  2. Disconnect the front muffler from the rubber hanger.

  3. Object Number: 1289575  Size: SH
  4. Remove the nuts and the gasket from the rear muffler pipe flange.
  5. Remove the front muffler.
  6. Inspect the exhaust pipe and the front muffler for holes, damage, open seams, or other deterioration which could permit exhaust fumes to seep into the passenger compartment or the trunk.

Installation Procedure


    Object Number: 1289575  Size: SH
  1. Connect the front muffler to the rubber hanger.
  2. Caution: Refer to Fastener Caution in the Preface section.

  3. Attach the front muffler and the gasket to the rear muffler using the nuts. Secure the front muffler to the rubber hanger.
  4. Tighten
    Tighten the front muffler-to-rear muffler nuts to 30 N·m (22 lb ft).


    Object Number: 1289564  Size: SH
  5. Loosely secure the front muffler assembly to the connecting pipe flange.
  6. Secure the front muffler assembly to the connecting pipe flange with the nuts.
  7. Tighten
    Tighten the front muffler-to-exhaust front pipe nuts to 30 N·m (22 lb ft).

Exhaust Muffler Replacement Gasoline Engine Rear

Removal Procedure


    Object Number: 1289575  Size: SH
  1. Remove the nuts and the gasket from the rear muffler pipe flange-to-front muffler pipe flange.

  2. Object Number: 1289593  Size: SH
  3. Detach the rear muffler assembly from the rubber hangers on the tail pipe end.
  4. Remove the rear muffler assembly.
  5. Inspect the rear muffler and the pipe for holes, damage, open seams, and other deterioration which could permit exhaust fumes to seep into the passenger compartment or the trunk.

Installation Procedure


    Object Number: 1289593  Size: SH
  1. Secure the rear muffler assembly to the rubber hangers on the tail pipe end.
  2. Caution: Refer to Fastener Caution in the Preface section.


    Object Number: 1289575  Size: SH
  3. Secure the nuts and the gasket from the rear muffler pipe flange-to-front muffler pipe flange.
  4. Tighten
    Tighten the front muffler-to-rear muffler nuts to 30 N·m (22 lb ft).

Exhaust Muffler Replacement Diesel Engine

Removal Procedure


    Object Number: 1889569  Size: SH

    Warning: In order to avoid being burned, do not service the exhaust system while it is still hot. Service the system when it is cool.

  1. Remove the rear muffler retaining nuts.
  2. Detach the both rear muffler assembly rubber hangers.
  3. Remove the rear muffler.

Installation Procedure


    Object Number: 1889569  Size: SH
  1. Install the rear muffler.
  2. Connect the rear muffler rubber hanger.
  3. Caution: Refer to Fastener Caution in the Preface section.

  4. Install the rear muffler retaining nuts.
  5. Tighten
    Tighten the rear muffler retaining nuts to 40 N·m (29.5 lb ft).