GM Service Manual Online
For 1990-2009 cars only

    Object Number: 20730  Size: SH
  1. Install the pump slide (348) into the valve body pump pocket.
  2. Install the slide seal support (349) and the seal (350) into the slide.
  3. Align the slide pivot with the pump pivot and install the slide pivot pin (345).
  4. Install the slide seal (347) into the slide (348).
  5. Install the slide seal support (346) into the slide (348).

  6. Object Number: 20729  Size: SH
  7. Install the following parts into the valve body:
  8. • The pump priming spring (359)
    • The spring retaining plug (358)
    • The retaining pin (304)

    Object Number: 20728  Size: SH
  9. Install a vane ring (351) into the pump pocket.
  10. Install the pump rotor (353) into the pump pocket.
  11. Install the seven pump vanes (352) into the rotor.
  12. Install a vane rin  (351) into the rotor.

  13. Object Number: 20727  Size: SH
  14. Insert a new auxiliary valve body gasket (331) and the auxiliary valve body cover (330) onto the auxiliary valve body.

  15. Object Number: 20763  Size: SH

    Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.

  16. Install four bolts (8).
  17. Tighten
    Tighten the bolts to 11 N·m (98 lb in).


    Object Number: 20726  Size: SH
  18. Position the auxiliary valve body assembly (343) onto the valve body and pump assembly (21).