GM Service Manual Online
For 1990-2009 cars only

Removal Procedure

  1. Drain cooling system. Refer to Cooling System Draining and Filling .
  2. Remove electric cooling fan. Refer to Engine Cooling Fan Replacement .

  3. Object Number: 659418  Size: SH
  4. Reposition the inlet hose clamp at the water pump.
  5. Remove the inlet hose from the water pump.
  6. Remove the accessory drive belt. Refer to Drive Belt Replacement - Accessory in Engine Mechanical - 6.0L.

  7. Object Number: 659509  Size: SH
  8. Reposition the outlet hose clamp at the water pump.
  9. Remove the outlet hose from the water pump.

  10. Object Number: 659180  Size: SH
  11. Reposition the surge tank outlet hose clamp at the water pump.
  12. Remove the surge tank outlet hose from the water pump.

  13. Object Number: 660665  Size: SH
  14. Reposition the heater inlet hose clamp at the water pump.
  15. Remove the heater inlet hose from the water pump.

  16. Object Number: 1492012  Size: SH
  17. Remove the water pump bolts (4).
  18. Remove the water pump (1) and gaskets (2).
  19. Discard the water pump gaskets (2).

Installation Procedure

Important: All gaskets surfaces are to be free of oil or other foreign material during assembly.

    Notice: Refer to Fastener Notice in the Preface section.


    Object Number: 1492012  Size: SH
  1. Install the water pump (1) and NEW gaskets (2).
  2. Install the water pump bolts (4).
  3. Tighten

    1. Tighten the water pump bolts a first pass to 15 N·m (11 lb ft).
    2. Tighten the water pump bolts a final pass to 30 N·m (22 lb ft).

    Object Number: 660665  Size: SH
  4. Install the heater inlet hose to the water pump.
  5. Position the heater inlet hose clamp at the water pump.

  6. Object Number: 659180  Size: SH
  7. Install the surge tank outlet hose to the water pump.
  8. Position the surge tank outlet hose clamp at the water pump.

  9. Object Number: 659509  Size: SH
  10. Install the outlet hose to the water pump.
  11. Position the outlet hose clamp at the water pump.
  12. Install the accessory drive belt. Refer to Drive Belt Tensioner Replacement - Accessory in Engine Mechanical - 6.0L.

  13. Object Number: 659418  Size: SH
  14. Install the inlet hose to the water pump.
  15. Position the inlet hose clamp at the water pump.
  16. Install electric cooling fan. Refer to Engine Cooling Fan Replacement .
  17. Fill cooling system. Refer to Cooling System Draining and Filling .