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HOMESERVICE MANUALSGMC1999FORWARD CONTROL 5.7 R, AUTOMATICREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 800 (ENGINE COOLING SYSTEM)REPAIR INSTRUCTIONSWATER PUMP REPLACEMENT (3.8L)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 2003 Buick Regal and 2003 Buick Century. 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. Reposition the accessory wiring junction block.
  3. Loosen the water pump pulley bolts.
  4. Remove the drive belt. Refer to DRIVE BELT REPLACEMENT (L36) or DRIVE BELT REPLACEMENT (L67) in Engine Mechanical-3.8L.
  5. Remove the water pump pulley bolts.
    Fig 1: Removing Water Pump Pulley & Bolts
    G01969630Courtesy of GENERAL MOTORS CORP.
  6. Remove the water pump pulley.
  7. Remove the power steering pump mounting bolts and reposition. Refer to POWER STEERING PUMP REPLACEMENT (3.8L) or POWER STEERING PUMP REPLACEMENT (3.1L) in Power Steering System.
  8. Remove the water pump bolts.
    Fig 2: Removing Water Pump Bolts
    G01969631Courtesy of GENERAL MOTORS CORP.
  9. Remove the water pump.
  10. Remove the water pump gasket.
  11. Clean and inspect the water pump gasket mating surfaces.
    Fig 3: Removing Water Pump & Gasket
    G01969632Courtesy of GENERAL MOTORS CORP.
RENDER: 1.0x

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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.