GM Service Manual Online
For 1990-2009 cars only

    Caution: Refer to Battery Disconnect Caution in the Preface section.


    Object Number: 1252124  Size: SH
  1. Disconnect the negative battery cable.
  2. Disconnect the oxygen sensor connector, if equipped.
  3. Remove the exhaust manifold heat shield bolts.
  4. Remove the exhaust manifold heat shield.

  5. Object Number: 1252162  Size: SH
  6. Remove the auxiliary catalytic converter upper flange nuts.

  7. Object Number: 1252164  Size: SH
  8. Remove the exhaust manifold retaining nuts in the sequence shown.
  9. Remove the exhaust manifold.
  10. Remove the exhaust manifold gasket.
  11. Caution: Refer to Safety Glasses Caution in the Preface section.

  12. Clean the sealing surfaces of the exhaust manifold and the cylinder head.