GM Service Manual Online
For 1990-2009 cars only

Exhaust Muffler Replacement LAT, LE5

Removal Procedure


    Object Number: 1885660  Size: SH
  1. Raise and suitably support the vehicle. Refer to Lifting and Jacking the Vehicle .
  2. Remove the catalytic converter to muffler nuts (1).

  3. Object Number: 1885729  Size: SH
  4. With the aid of an assistant, remove the muffler insulators (1) from the hangers.
  5. Remove the muffler assembly.

Installation Procedure


    Object Number: 1885729  Size: SH

    Important: Replace the muffler hangers any time the exhaust system is removed from the vehicle. Do not use any mineral oil based lubricants or sharp tools when installing new exhaust system hangers.

  1. With the aid of an assistant , position the muffler assembly.
  2. Install the muffler insulators (1) to the hangers.
  3. Notice: Refer to Fastener Notice in the Preface section.


    Object Number: 1885660  Size: SH
  4. Install the catalytic converter to muffler nuts.
  5. Tighten
    Tighten the nuts to 25 N·m (18 lb ft).

Exhaust Muffler Replacement LZ4

Removal Procedure


    Object Number: 1885966  Size: SH
  1. Raise and suitably support the vehicle. Refer to Lifting and Jacking the Vehicle .
  2. Remove the catalytic converter to muffler nuts (1).

  3. Object Number: 1885979  Size: SH
  4. With the aid of an assistant, remove the muffler insulators (1) from the hangers.
  5. Remove the muffler assembly.

Installation Procedure


    Object Number: 1885979  Size: SH

    Important: Replace the muffler hangers any time the exhaust system is removed from the vehicle. Do not use any mineral oil based lubricants or sharp tools when installing new exhaust system hangers.

  1. With the aid of an assistant , position the muffler assembly.
  2. Install the muffler insulators (1) to the hangers.
  3. Notice: Refer to Fastener Notice in the Preface section.


    Object Number: 1885966  Size: SH
  4. Install the catalytic converter to muffler nuts.
  5. Tighten
    Tighten the nuts to 25 N·m (18 lb ft).

Exhaust Muffler Replacement LY7

Removal Procedure


    Object Number: 1885966  Size: SH
  1. Raise and suitably support the vehicle. Refer to Lifting and Jacking the Vehicle .
  2. Remove the catalytic converter to muffler nuts (1).

  3. Object Number: 1885979  Size: SH
  4. With the aid of an assistant, remove the muffler insulators (1) from the hangers.
  5. Remove the muffler assembly.

Installation Procedure


    Object Number: 1885979  Size: SH

    Important: Replace the muffler hangers any time the exhaust system is removed from the vehicle. Do not use any mineral oil based lubricants or sharp tools when installing new exhaust system hangers.

  1. With the aid of an assistant , position the muffler assembly.
  2. Install the muffler insulators (1) to the hangers.
  3. Notice: Refer to Fastener Notice in the Preface section.


    Object Number: 1885966  Size: SH
  4. Install the catalytic converter to muffler nuts.
  5. Tighten
    Tighten the nuts to 25 N·m (18 lb ft).