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Home >> Hummer >> 2003 >> H2 >> Repair and Diagnosis >> Engine Mechanical >> Cooling System (Mechanical) >> Engine Cooling >> Repair Instructions >> Water Pump Replacement >> Removal Procedure

Removal Procedure

  1. Drain the cooling system. Refer to Draining and Filling Cooling System .
  2. Loosen the air cleaner outlet duct clamps at the following locations:
    • Throttle body
    • Mass airflow/intake air temperature (MAF/IAT) sensor
    Fig 1: MAF/IAT Sensor & Air Cleaner Assembly
    GM832908Courtesy of GENERAL MOTORS CORP.
  3. Remove the radiator inlet hose clip from the outlet duct.
  4. Remove the air cleaner outlet duct.
    5. Fig 2: View Of Vent Inlet Hose At Throttle Body
    GM659465Courtesy of GENERAL MOTORS CORP.
  5. Remove the radiator vent inlet hose from the radiator hose clips.
    6. Fig 3: View Of Inlet Hose & Water Pump (4.8, 5.3, & 6.0L)
    GM659418Courtesy of GENERAL MOTORS CORP.
  6. Reposition the inlet hose clamp at the water pump.
  7. Remove the inlet hose from the water pump.
  8. Remove the fan blade. Refer to Fan Replacement .
  9. Remove the accessory drive belt. Refer to DRIVE BELT REPLACEMENT - ACCESSORY .
    10. Fig 4: View Of Outlet Hose & Water Pump (4.8, 5.3, & 6.0L)
    GM659509Courtesy of GENERAL MOTORS CORP.
  10. Reposition the outlet hose clamp at the water pump.
  11. Remove the outlet hose from the water pump.
    12. Fig 5: Surge Tank Outlet Hose
    GM659180Courtesy of GENERAL MOTORS CORP.
  12. Reposition the surge tank outlet hose clamp at the water pump.
  13. Remove the surge tank outlet hose from the water pump.
    14. Fig 6: Heater Inlet Hose
    GM660665Courtesy of GENERAL MOTORS CORP.
  14. Reposition the heater inlet hose clamp at the water pump.
  15. Remove the heater inlet hose from the water pump.
    16. Fig 7: View Of Water Pump & Bolt
    GM260121Courtesy of GENERAL MOTORS CORP.
  16. Remove the water pump bolts.
  17. Remove the water pump and gaskets.
  18. Discard the water pump gaskets.
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