GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 GMC_Truck 🢒 2009 🢒 TopKick C-Series (Conventional) C4/C5 🢒 Engine 🢒 Engine Mechanical - 6.6L 🢒 Water Pump Cleaning and Inspection

    Object Number: 663772 Size: SH
  1. Remove the O-ring from the water pump and discard.
  2. Remove the water pump to water pump housing bolts.
  3. Remove the water pump from the water pump housing.
  4. Remove the O-ring from the water pump housing and discard.

    5. Object Number: 663773 Size: SH
  5. Clean the water pump assembly.
  6. Clean the water pump mating surfaces.
  7. Inspect the water pump gear for damage.
  8. Inspect the water pump mating surfaces for damage.
  9. Inspect the water pump shaft for looseness.
  10. Inspect the water pump assembly for damage.
  11. Replace the water pump if any damage is found.

    12. Object Number: 663772 Size: SH
  12. Install a new O-ring to the water pump housing.
  13. Lubricate the O-ring with engine coolant.
  14. Install the water pump to the water pump housing.

    15. Caution: Refer to Fastener Caution in the Preface section.

  15. Install the water pump to water pump housing bolts. Tighten the water pump to water pump housing bolts to 21 N·m (15 lb ft).
  16. Install a new O-ring to the water pump.