GM Service Manual Online
For 1990-2009 cars only
  1. Drain the oil from the oil pump.

  2. Object Number: 5274  Size: SH
  3. Remove the drive shaft.
  4. Important: Do not remove the pickup tube from the cover unless the pickup tube is loose or broken.


    Object Number: 5276  Size: SH
  5. Remove the oil pump cover bolts.

  6. Object Number: 5277  Size: SH
  7. Remove the oil pump cover.

  8. Object Number: 5278  Size: SH
  9. Remove the oil pump gears.
  10. Caution: In some models, the pressure regulator valve spring is under pressure. Remove the retaining pin carefully in order to avoid bodily injury.


    Object Number: 5279  Size: SH
  11. Remove the pressure regulator valve components in the following order:
  12. 6.1. Remove the cotter pin.
    6.2. Remove the spring.

    Caution: Bodily injury may occur if the cleaning solvent is inhaled or exposed to the skin.

    6.3. Remove the pressure regulator valve. If the valve is stuck, soak the pump housing in carburetor cleaning solvent.