GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 2008 🢒 TrailBlazer - 4WD 🢒 Engine 🢒 Engine Exhaust 🢒 Exhaust Muffler Replacement

Removal Procedure

    Object Number: 1922948 Size: SH
  1. Remove the frame brace. Refer to Frame Brace Replacement .
  2. Remove the spare tire.
  3. Remove the rear axle tie rod. Refer to Rear Axle Tie Rod Replacement .
  4. Remove the rear axle brace. Refer to Rear Axle Brace Replacement .
  5. Remove the shock absorber lower mounting bolts and move aside. Refer to Shock Absorber Replacement .
  6. Remove the right rear coil spring, if equipped. Refer to Coil Spring Replacement .
  7. If equipped with a 4.2L engine, remove the catalytic converter to muffler nuts (1).

    8. Object Number: 1922951 Size: SH
  8. If equipped with a 5.3L, or 6.0L engine, remove the muffler to catalytic converter nuts (1).

    9. Object Number: 1923248 Size: SH
  9. With the aid of an assistant, separate the exhaust insulators (1, 3, and 4) from the muffler hangers.
  10. With the aid of an assistant, remove the muffler assembly (2) from the vehicle.

Installation Procedure

    Object Number: 1923248 Size: SH
  1. With the aid of an assistant, install the muffler assembly (2) to the vehicle.
  2. With the aid of an assistant, install the exhaust insulators (1, 3, and 4) to the muffler hangers.

    3. Notice: Refer to Fastener Notice in the Preface section.


    Object Number: 1922951 Size: SH
  3. If equipped with a 5.3L, or 6.0L engine, install the muffler to catalytic converter nuts (1).

    4. Tighten
    Tighten the nuts to 45 N·m (33 lb ft).


    Object Number: 1922948 Size: SH
  4. If equipped with a 4.2L engine, install the catalytic converter to muffler nuts (1).

    5. Tighten
    Tighten the nuts to 45 N·m (33 lb ft).

  5. Install the right rear coil spring, if equipped. Refer to Coil Spring Replacement .
  6. Position the shock absorbers and install the lower mounting bolts. Refer to Shock Absorber Replacement .
  7. Install the rear axle brace. Refer to Rear Axle Brace Replacement .
  8. Install the rear axle tie rod. Refer to Rear Axle Tie Rod Replacement .
  9. Install the spare tire.
  10. Install the frame brace. Refer to Frame Brace Replacement .