GM Service Manual Online
For 1990-2009 cars only

    Object Number: 601942  Size: SH
  1. Remove the oxygen sensor from the exhaust manifold to prevent damage to the sensor.

  2. Object Number: 601943  Size: SH
  3. Remove the air injection nuts (1) and (2), (if equipped).
  4. Remove the air injection pipe from the exhaust manifold, (if equipped).

  5. Object Number: 601946  Size: SH
  6. Remove the exhaust manifold nuts.
  7. Remove the exhaust manifold.
  8. Remove the exhaust manifold gasket.