GM Service Manual Online
For 1990-2009 cars only
  1. Remove the rocker arm cover. Refer to Valve Rocker Arm Cover Removal.
  2. Remove the rocker arms and push rods. Refer to Valve Rocker Arm Cover Removal.
  3. Remove the cylinder head. Refer to Cylinder Head Removal.

  4. Object Number: 3682  Size: SH
  5. Remove the bolts that secure the lifter anti-rotation brackets.

  6. Object Number: 3683  Size: SH
  7. Remove the anti-rotation brackets.

  8. Object Number: 3684  Size: SH
  9. Remove the valve lifters from the lifter bore.
  10. Inspect the valve lifter for the following conditions:
  11. • Lifter wear
    • Lifter scuffing
    • Loose roller shaft
  12. Inspect the valve lifter bore in the engine block for wear and scuffing.
  13. Inspect the roller for freedom of movement.
  14. Inspect the roller surface for flat spots and pitting.