GM Service Manual Online
For 1990-2009 cars only

Removal Procedure


    Object Number: 1856779  Size: SH
  1. Remove the catalytic converter. Refer to Catalytic Converter Replacement.
  2. If vehicle has a regular cab, remove the exhaust heat shield nuts.
  3. Remove the exhaust front heat shield (1) and/or the rear exhaust heat shield (2) from the studs.

  4. Object Number: 1856781  Size: SH
  5. If vehicle has extended cab, remove the exhaust heat shield nuts.
  6. Remove the exhaust front heat shield (1) and/or the rear exhaust heat shield (2) from the studs.

  7. Object Number: 1856782  Size: SH
  8. If vehicle has a crew cab, remove the exhaust heat shield nuts.
  9. Remove the exhaust front heat shield (1) and/or the rear exhaust heat shield (2) from the studs.

Installation Procedure


    Object Number: 1856782  Size: SH
  1. If vehicle has a crew cab, position and install the rear exhaust heat shield (2) and/or the front exhaust heat shield (1) to the underbody studs.
  2. Notice: Refer to Fastener Notice in the Preface section.

  3. Install the exhaust heat shield nuts.
  4. Tighten
    Tighten the nuts to 9 N·m (80 lb in).


    Object Number: 1856781  Size: SH
  5. If vehicle has a extended cab, position and install the rear exhaust heat shield (2) and/or the front exhaust heat shield (1) to the underbody studs.
  6. Install the exhaust heat shield nuts.
  7. Tighten
    Tighten the nuts to 9 N·m (80 lb in).


    Object Number: 1856779  Size: SH
  8. If vehicle has a regular cab, position and install the rear exhaust heat shield (2) and/or the front exhaust heat shield (1) to the studs.
  9. Install the exhaust heat shield nuts.
  10. Tighten
    Tighten the nuts to 9 N·m (80 lb in).

  11. Install the catalytic converter. Refer to Catalytic Converter Replacement.