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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 1003 (Engine Cooling System) >> Repair Instructions >> Water Pump Replacement (4.8L, 5.3L, and 6.0L Engines) >> Removal Procedure

Removal Procedure

WARNING: This page is about a different car, the 2004 GMC Sierra, 2004 GMC Cab & Chassis Sierra, 2004 Chevrolet Silverado, and 2004 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
  1. Drain the cooling system. Refer to Draining and Filling Cooling System (with HP2)  or Draining and Filling Cooling System (without HP2) .
  2. Loosen the air cleaner outlet duct clamps at the following locations:
    • Throttle body
    • Mass airflow/intake air temperature (MAF/IAT) sensor
  3. Remove the radiator inlet hose clip from the outlet duct.
  4. Remove the air cleaner outlet duct.
    5. Fig 1: View Of Air Cleaner Outlet Duct
    GM832066Courtesy of GENERAL MOTORS CORP.
  5. If necessary, remove the engine sight shield. Refer to Engine Sight Shield Replacement (4.8L, 5.3L, and 6.0L Engines) or Engine Sight Shield Replacement (6.0L Engine w/RPOs Y91 and Z88) in Engine Mechanical - 4.8L, 5.3L, and 6.0L.
  6. Remove the radiator vent inlet hose from the radiator hose clips.
    7. Fig 2: View Of Vent Inlet Hose At Throttle Body
    GM659465Courtesy of GENERAL MOTORS CORP.
  7. Reposition the inlet hose clamp at the water pump.
  8. Remove the inlet hose from the water pump.
    9. Fig 3: View Of Radiator Inlet Hose
    GM846666Courtesy of GENERAL MOTORS CORP.
  9. Remove the fan blade. Refer to Fan Replacement .
  10. Remove the accessory drive belt. Refer to Drive Belt Replacement - Accessory (4.8L, 5.3L, and 6.0L Engines) or Drive Belt Replacement - Accessory (5.3L Engine w/RPO HP2) in Engine Mechanical - 4.8L, 5.3L, and 6.0L.
  11. Reposition the outlet hose clamp at the water pump.
  12. Remove the outlet hose from the water pump.
    13. Fig 4: View Of Water Pump Outlet Hose
    GM846668Courtesy of GENERAL MOTORS CORP.
  13. Reposition the surge tank outlet hose clamp at the water pump.
  14. Remove the surge tank outlet hose from the water pump.
    15. Fig 5: View Of Surge Tank Outlet Hose To Water Pump
    GM659180Courtesy of GENERAL MOTORS CORP.
  15. Reposition the heater inlet hose clamp at the water pump.
  16. Remove the heater inlet hose from the water pump.
    17. Fig 6: View Of Heater Inlet Hose At Water Pump
    GM660665Courtesy of GENERAL MOTORS CORP.
  17. Remove the water pump bolts.
    18. Fig 7: View Of Water Pump, Gaskets & Bolts
    GM260121Courtesy of GENERAL MOTORS CORP.
  18. Remove the water pump and gaskets.
  19. Discard the water pump gaskets.
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