GM Service Manual Online
For 1990-2009 cars only

    Notice: Refer to Fastener Notice in the Preface section.


    Object Number: 412550  Size: SH
  1. Install new exhaust manifold studs.
  2. Tighten
    Tighten the studs to 10 N·m (89 lb in).


    Object Number: 746061  Size: SH
  3. Install the exhaust manifold gasket.
  4. Install the exhaust manifold to the cylinder head.
  5. Install NEW exhaust manifold to cylinder head retaining nuts finger tight.

  6. Object Number: 1340643  Size: SH
  7. Tighten the NEW exhaust manifold to cylinder head retaining nuts in sequence.
  8. Tighten
    Tighten the nuts a second time to 14 N·m (124 lb in).


    Object Number: 1867005  Size: SH
  9. Coat the threads of the oxygen sensor with antiseize GM P/N 12397953 or equivalent.
  10. Install the oxygen sensor.
  11. Tighten
    Tighten the oxygen sensor to 42 N·m (31 lb ft).


    Object Number: 1867003  Size: SH
  12. Install the exhaust manifold heat shield.
  13. Install the exhaust manifold heat shield bolts.
  14. Tighten
    Tighten the bolts to 22 N·m (16 lb ft).

    Caution: Refer to Fastener Caution in the Preface section.


    Object Number: 412550  Size: SH
  1. Install new exhaust manifold studs and tighten to 10 N·m (89 lb in).

  2. Object Number: 746061  Size: SH
  3. Install the exhaust manifold gasket.
  4. Install the exhaust manifold to the cylinder head.
  5. Install NEW exhaust manifold to cylinder head retaining nuts finger tight.

  6. Object Number: 1340643  Size: SH
  7. Tighten the NEW exhaust manifold to cylinder head retaining nuts in sequence. Tighten the nuts a second time to 14 N·m (124 lb in).

  8. Object Number: 1867005  Size: SH
  9. Coat the threads of the oxygen sensor with antiseize GM P/N 12397953 or equivalent.
  10. Install the oxygen sensor and tighten to 42 N·m (31 lb ft).

  11. Object Number: 1867003  Size: SH
  12. Install the exhaust manifold heat shield.
  13. Install the exhaust manifold heat shield bolts and tighten to 25 N·m (18 lb ft).