GM Service Manual Online
For 1990-2009 cars only
  1. Remove the rocker arm cover. Refer to Valve Rocker Arm Cover Removal.

  2. Object Number: 3685  Size: SH
  3. Remove the rocker arm nuts.
  4. Important: Be sure that valve train components are kept together and identified so that they can be installed in their original location.

  5. Remove the rocker arm balls.
  6. Remove the rocker arms.

  7. Object Number: 1963  Size: SH
  8. Remove the pushrods.