GM Service Manual Online
For 1990-2009 cars only

Removal Procedure


    Object Number: 277030  Size: SH
  1. Partially drain the cooling system. Refer to Cooling System Draining and Filling .
  2. Remove the surge tank outlet hose. Refer to Surge Tank Hose Replacement .
  3. Loosen the water pump pulley bolts.
  4. Remove the drive belt. Refer to Drive Belt Replacement in Engine Mechanical - 3.5L.
  5. Remove the idler pulley bolt.
  6. Remove the idler pulley.

  7. Object Number: 293989  Size: SH
  8. Remove the water pump pulley bolts.
  9. Remove the water pump pulley.

  10. Object Number: 293992  Size: SH
  11. Remove the long water pump bolts (1).

  12. Object Number: 293994  Size: SH
  13. Remove the short water pump bolts (1).

  14. Object Number: 293990  Size: SH
  15. Remove the water pump.
  16. Remove the water pump gasket.
  17. Clean and inspect the water pump mating surfaces.
  18. Clean and inspect the water pump, if necessary. Refer to Water Pump Cleaning and Inspection .

Installation Procedure


    Object Number: 293990  Size: SH
  1. Install the water pump gasket.
  2. Install the water pump.
  3. Loosely install the long water pump bolts.
  4. Loosely install the short water pump bolts.
  5. 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.

  6. Install the water pump bolts.
  7. Tighten
    Tighten the water pump bolts to 14 N·m (124 lb in).

  8. Install the water pump pulley.
  9. Loosely install the water pump pulley bolts.
  10. Install the idler pulley.
  11. Install the idler pulley bolt.
  12. Tighten
    Tighten the idler pulley bolt to 50 N·m (37 lb ft).

  13. Install the drive belt. Refer to Drive Belt Replacement in Engine Mechanical - 3.5L.
  14. Install the surge tank outlet hose. Refer to Surge Tank Hose Replacement .
  15. Fill the cooling system. Refer to Cooling System Draining and Filling .
  16. Inspect for leaks.