GM Service Manual Online
For 1990-2009 cars only

    Caution: Refer to Fastener Caution in the Preface section.


    Object Number: 470683  Size: SH
  1. Install the exhaust manifold studs into the cylinder head, if necessary. Tighten the exhaust manifold studs to 20 N·m (15 lb ft).

  2. Object Number: 470686  Size: SH
  3. Install the NEW left exhaust manifold gasket.
  4. Install the left exhaust manifold.
  5. Install the left exhaust manifold nuts and center bolt.
  6. 4.1. Tighten the left exhaust manifold center bolt to 35 N·m (26 lb ft).
    4.2. Tighten the left exhaust manifold nuts to 16 N·m (12 lb ft).

    Object Number: 784332  Size: SH
  7. Install the left exhaust manifold heat shield.
  8. Install the left exhaust manifold heat shield bolts and nuts. Tighten the left exhaust manifold heat shield bolts and nuts to 25 N·m (18 lb ft).

  9. Object Number: 470690  Size: SH
  10. Install the left spark plugs. Tighten the left spark plugs to 20 N·m (15 lb ft).

  11. Object Number: 1309937  Size: SH

    Note: Fully install the spark plug wire by pushing on the exposed end of the spark plug boot. Do not push the spark plug wire onto the spark plug by using the metal heat shield.

  12. Install the left spark plug wires to the spark plugs and ignition coils.