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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 1498 (Engine Cooling System) >> Repair Instructions >> Water Pump Replacement (5.3L Engine) >> Removal Procedure

Removal Procedure

WARNING: This page is about a different car, the 2003 Oldsmobile Bravada, 2003 GMC Envoy XL, 2003 GMC Envoy, and 2003 Chevrolet TrailBlazer. 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 (BODY VIN CODE 6)   or  DRAINING AND FILLING COOLING SYSTEM (BODY VIN CODE 3)   .
  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 air cleaner outlet duct bolt and duct.
  4. Remove the accessory drive belt. Refer to DRIVE BELT REPLACEMENT - ACCESSORY  in Engine Mechanical - 4.8L, 5.3L, and 6.0L.
  5. Remove the cooing fan and shroud. Refer to COOLING FAN AND SHROUD REPLACEMENT   .
    Fig 1: Removing Air Cleaner Outlet Duct Bolt & Duct (5.3L Engine)
    G02129825Courtesy of GENERAL MOTORS CORP.
  6. Using J 38185  , reposition the inlet hose clamp at the water pump.
  7. Remove the inlet hose from the water pump.
    Fig 2: Removing Inlet Hose From Water Pump (5.3L Engine)
    G02129826Courtesy of GENERAL MOTORS CORP.
  8. Using J 38185  , reposition the outlet hose clamp at the water pump.
  9. Remove the outlet hose from the water pump.
    Fig 3: Removing Outlet Hose From Water Pump (5.3L Engine)
    G02129827Courtesy of GENERAL MOTORS CORP.
  10. Remove the auxiliary heater inlet and outlet hose/pipe nut.
  11. Using J 38185  , reposition the throttle body hose clamp at the throttle body.
  12. Remove the hose from the throttle body.
  13. Using J 38185  , reposition the auxiliary heater inlet and outlet hose/pipe clamps at the water pump.
  14. Remove the inlet and outlet hoses/pipes from the water pump.
    Fig 4: Removing Inlet & Outlet Hoses/Pipes From Water Pump (5.3L Engine)
    G02129828Courtesy of GENERAL MOTORS CORP.
  15. Disconnect the auxiliary heater inlet and outlet hoses/pipes from the heater water shutoff valve.
  16. Remove the auxiliary heater inlet and outlet hoses/pipes.
    Fig 5: Removing Auxiliary Heater Inlet & Outlet Hoses/Pipes (5.3L Engine)
    G02129829Courtesy of GENERAL MOTORS CORP.
  17. Remove the water pump bolts.
  18. Remove the water pump and gaskets.
  19. Discard the water pump gaskets.
    Fig 6: Removing Water Pump & Gaskets (5.3L Engine)
    G02129830Courtesy of GENERAL MOTORS CORP.
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