GM Service Manual Online
For 1990-2009 cars only

Water Pump Replacement Water Pump Replacement

Removal Procedure

  1. Drain the coolant. Refer to Cooling System Draining and Filling .
  2. Remove the drive belt guard, bolts and the nuts. Refer to Engine Mechanical.

  3. Object Number: 30978  Size: SH
  4. Loosen the water pump pulley bolts.
  5. Remove the drive belt. Refer to Drive Belt Replacement Engine Mechanical.

  6. Object Number: 30996  Size: SH
  7. Remove the water pump pulley bolts.
  8. Remove the water pump pulley.
  9. Remove the water pump attaching bolts.
  10. Remove the water pump.
  11. Remove the water pump gasket.
  12. Clean the water pump mating surfaces.

Installation Procedure

NOTICE: When adding coolant, it is important that you use GM Goodwrench DEX-COOL® or HAVOLINE® DEX-COOL® coolant. If Coolant other than DEX-COOL® or HAVOLINE® DEX-COOL® is added to the system the engine coolant will require change sooner; at 50 000 km (30,000 mi) or 24 months.


    Object Number: 26000  Size: SH
  1. Install the gasket.
  2. Install the water pump.
  3. Install the water pump mounting bolts.
  4. Tighten
    Tighten the water pump bolts to 10N·m (89 lb in).


    Object Number: 30978  Size: SH
  5. Install the water pump pulley. Loosely install the mounting bolts.
  6. Install the drive belt. Refer to Drive Belt Replacement Engine Mechanical.
  7. Tighten the water pump pulley bolts.
  8. Tighten
    Tighten the water pump pulley bolts to 25N·m (18 lb in).

  9. Install the drive belt guard, bolts and the nuts. Refer to Engine Mechanical.
  10. Important: Properly filling a system that has been completely drained will require the use of the air bleed vents.

  11. Refill the coolant. Refer to Cooling System Draining and Filling .
  12. Inspect for leaks.