GM Service Manual Online
For 1990-2009 cars only
  1. Remove fuel delivery pipe.
  2. Remove fuel injector rail with fuel injector assemblies.

  3. Object Number: 2015699  Size: SH
  4. Remove the five bolts (1,3,8,10,11) and two nuts (2,5) retaining the intake manifold.
  5. Remove the intake manifold.
  6. Remove the gasket from the intake manifold.

  7. Object Number: 2017771  Size: SH
  8. Remove the intake manifold insulator (1).
  9. Remove knock sensor.