GM Service Manual Online
For 1990-2009 cars only

    Object Number: 1979  Size: SH
  1. Remove the Oxygen sensor from the exhaust manifold to prevent damage to the sensor.

  2. Object Number: 31881  Size: SH
  3. Remove the exhaust manifold nuts.
  4. Remove the exhaust manifold.
  5. Remove the exhaust manifold gasket.