GM Service Manual Online
For 1990-2009 cars only

    Object Number: 746055  Size: SH
  1. Remove the exhaust manifold heat shield.

  2. Object Number: 825111  Size: SH
  3. Remove the block heater if equipped.

  4. Object Number: 865339  Size: SH
  5. Remove the oxygen sensor.

  6. Object Number: 746061  Size: SH
  7. Remove and discard the exhaust manifold to cylinder head retaining nuts.
  8. Remove the exhaust manifold.
  9. Clean all of the sealing surfaces.
  10. If the exhaust manifold is being replaced, transfer the following parts:
  11. • The exhaust manifold heat shield
    • The oxygen sensor

Removal Procedure


    Object Number: 897651  Size: SH
  1. Remove the air pipe nut, if equipped.
  2. Remove the air pipe bolts, if equipped.
  3. Remove the air pipe, if equipped.
  4. Remove the air pipe gasket, if equipped.

  5. Object Number: 895182  Size: SH
  6. Remove the exhaust manifold heat shield.

  7. Object Number: 898894  Size: SH
  8. Remove the engine block heater, if equipped.
  9. Remove the heated oxygen sensor.
  10. Remove the exhaust manifold to the cylinder head retaining nuts.
  11. Remove the exhaust manifold.
  12. Clean all sealing surfaces.
  13. If the exhaust manifold is being replaced, transfer the following parts:
  14. • The exhaust manifold heat shield
    • The heated oxygen sensor
  15. Replace the exhaust manifold nuts.