GM Service Manual Online
For 1990-2009 cars only
  1. Clean all of the parts with clean solvent.
  2. • Blow-dry the parts with compressed air.
    • Wear protective safety glasses and gloves.
  3. Inspect the system for the following conditions:
  4. • Damage to the pump body and cover
    • Gear wear
    • Improper fitting of the drive gear and the shaft within the pump body
    • Wear to the spacer plate that would permit oil to leak past the ends of the gears
    • Wear to the spacer plate bushing
    • Wear to the driven gear bushings
    • Wear to the idler shaft
    • Damage to the pickup screen and the tube