GM Service Manual Online
For 1990-2009 cars only

Exhaust System Insulator, Hanger, Bracket Replacement Converter to Transmission

Removal Procedure

  1. Raise the vehicle. Refer to Lifting and Jacking the Vehicle .
  2. Disconnect the heated oxygen sensor (HO2S) electrical connector.
  3. Remove the nuts that secure the catalytic converter pipe to the exhaust manifold.
  4. Discard the old exhaust seal. Do NOT reuse the seal.
  5. Remove the nuts that secure the catalytic converter pipe to the muffler.

  6. Object Number: 1338720  Size: SH
  7. Remove the bolt securing the exhaust hanger to the transmission mount.
  8. Remove the transmission mount.
  9. Remove the catalytic converter and exhaust hanger assembly from the vehicle.

  10. Object Number: 1338721  Size: SH
  11. Remove the exhaust hanger from the catalytic converter.

Installation Procedure


    Object Number: 1338721  Size: SH
  1. Install the exhaust hanger to the catalytic converter.
  2. Install the catalytic converter and exhaust hanger assembly to the vehicle.
  3. Notice: Refer to Fastener Notice in the Preface section.


    Object Number: 1338720  Size: SH
  4. Install the bolt securing the catalytic converter pipe hanger to the transmission mount.
  5. Tighten
    Tighten the bolt to 30 N·m (22 lb ft).

  6. Install the transmission mount.
  7. Install the catalytic converter pipe to the exhaust manifold with a NEW exhaust seal.
  8. Hand thread the nuts evenly against the exhaust flange until the pipe is secure.
  9. Tighten
    Tighten the nuts to 50 N·m (37 lb ft).

  10. Connect the HO2S electrical connector.
  11. Lower the vehicle.

Exhaust System Insulator, Hanger, Bracket Replacement Adjustable Exhaust Hanger

Removal Procedure

  1. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle .

  2. Object Number: 2028495  Size: SH
  3. Remove the exhaust hanger bracket assembly bolts (4).
  4. Remove the adjustable exhaust hanger bracket assembly (3) from the muffler hanger rod.
  5. Remove 2 U-clips in the slots (1 and 2) in the spare tire crossmember.

Installation Procedure


    Object Number: 2028495  Size: SH
  1. Install 2 NEW U-clips in the slots (1 and 2) in the spare tire crossmember. Seat the clips into position.
  2. Install the adjustable exhaust hanger bracket assembly (3) onto the muffler hanger rod with the 2 bolts (4) and hand tighten.
  3. Notice: Refer to Fastener Notice in the Preface section.

  4. Position the adjustable exhaust hanger bracket assembly (3) so that the exhaust tip is centered with at least 25 mm (1 in) of clearance to the rear fascia opening.
  5. Tighten
    Tighten the exhaust hanger bracket bolts to 22 N·m (16 lb ft).