GM Service Manual Online
For 1990-2009 cars only

Exhaust Muffler Replacement Front

Removal Procedure

    Caution: Refer to Exhaust Service Caution in the Preface section.

    Caution: Refer to Battery Disconnect Caution in the Preface section.


    Object Number: 1557814  Size: SH
  1. Disconnect the negative battery cable.
  2. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.
  3. Remove the catalytic converter to front muffler flange bolts (1).
  4. Support the left and right side catalytic converter assembly with a jackstand.
  5. Remove the front muffler to rear muffler flange bolts (2).
  6. Separate the front muffler from the catalytic converter and rear muffler assemblies.
  7. Remove the front muffler assembly from the support hangers.
  8. Remove the front muffler assembly from the vehicle.

Installation Procedure


    Object Number: 1557814  Size: SH
  1. Position the catalytic converter assembly to the vehicle.
  2. Install the front muffler assembly to the support hangers.
  3. Notice: Refer to Fastener Notice in the Preface section.

  4. Install the front muffler to rear muffler flange bolts (2).
  5. Tighten
    Tighten the front muffler to rear muffler flange bolts to 25 N·m (18 lb ft).

  6. Install the catalytic converter to front muffler flange bolts (1).
  7. Tighten
    Tighten the catalytic converter to front muffler flange bolts to 40 N·m (30 lb ft).

  8. Remove the jackstand supporting the left and right side muffler assembly.
  9. Lower the vehicle.
  10. Caution: Refer to Exhaust Service Caution in the Preface section.

    Caution: Refer to Battery Disconnect Caution in the Preface section.

  11. Connect the negative battery cable.

Exhaust Muffler Replacement Rear

Removal Procedure

    Caution: Refer to Exhaust Service Caution in the Preface section.

    Caution: Refer to Battery Disconnect Caution in the Preface section.


    Object Number: 1557823  Size: SH
  1. Disconnect the negative battery cable.
  2. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.
  3. Remove the front muffler to rear muffler flange nuts (1).
  4. Separate the front muffler from the rear muffler assemblies.
  5. Remove the rear muffler assembly from the support hangers (2).
  6. Remove the rear muffler assembly from the vehicle.

Installation Procedure


    Object Number: 1557823  Size: SH
  1. Position the rear muffler assembly to the vehicle.
  2. Install the rear muffler assembly to the support hangers (2).
  3. Notice: Refer to Fastener Notice in the Preface section.

  4. Install the front muffler to rear muffler flange nuts (1).
  5. Tighten
    Tighten the front muffler to rear muffler flange bolts to 25 N·m (18 lb ft).

    Caution: Refer to Exhaust Service Caution in the Preface section.

    Caution: Refer to Battery Disconnect Caution in the Preface section.

  6. Lower the vehicle.
  7. Connect the negative battery cable.