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HOMESERVICE MANUALSGMC1999FORWARD CONTROL 5.7 R, AUTOMATICREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 404 (ENGINE COOLING SYSTEM)REPAIR INSTRUCTIONSWATER PUMP REPLACEMENT (L47)REMOVAL PROCEDURE
1999 GMC Forward Control 5.7 R, Automatic

Removal Procedure

1999 GMC Forward Control 5.7 R, AutomaticSECTION Removal Procedure
WARNING: This page is about a different car, the 2002 Oldsmobile Aurora and 2001 Oldsmobile Aurora. 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 .
  2. Remove the air cleaner assembly. .
  3. Remove the secondary AIR injection control valve. Refer to REMOVAL & INSTALLATION (4.0L -- BANK 2) .
  4. Remove the oil level indicator tube nut.
  5. Remove the water pump belt cover.
    Fig 1: Removing Water Pump Belt Cover
    G01817573Courtesy of GENERAL MOTORS CORP.
  6. Remove the water pump drive belt (4).
  7. Disconnect the radiator outlet hose from the thermostat housing.
    Fig 2: Removing Water Pump Drive Belt
    G01817574Courtesy of GENERAL MOTORS CORP.
  8. Remove the water pump cover bolts.
  9. Remove the water pump cover.
  10. Disconnect the heater return hose.
    Fig 3: Removing Water Pump Cover
    G01817575Courtesy of GENERAL MOTORS CORP.
  11. Position the J 38816-A  to the water pump locking ears.
  12. Fasten the support plate to the water housing crossover, to ensure proper engagement of the tool to the water pump locking ears.
  13. Using the J 38816-A  , turn the pump clockwise in order to remove the pump from the housing.
  14. Remove the support plate from the water housing crossover.
    Fig 4: Identifying J 38816-A
    G01817576Courtesy of GENERAL MOTORS CORP.
  15. Remove the water pump from the vehicle.
  16. Remove the seal from the water crossover.
  17. Clean the sealing surfaces of the water housing crossover and the pump cover.
  18. Clean and inspect the water pump. Refer to WATER PUMP CLEANING AND INSPECTION .
    Fig 5: Removing Water Pump
    G01817577Courtesy of GENERAL MOTORS CORP.
RENDER: 1.0x

NO RELATED

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.