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HOMESERVICE MANUALSCHEVROLET2008CHEVY EXPRESS G3500, VAN PASSENGER EXTENDEDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 226 (ENGINE COOLING SYSTEM)REPAIR INSTRUCTIONSWATER PUMP REPLACEMENT (LH2)REMOVAL PROCEDURE
2008 Chevrolet Chevy Express G3500, Van Passenger Extended

Removal Procedure

2008 Chevrolet Chevy Express G3500, Van Passenger ExtendedSECTION Removal Procedure
WARNING: This page is about a different car, the 2008 Cadillac STS. However, it is still accessible from the selected car via links, so may be relevant.
    Fig 1: View Of Water Pump Pulley Bolts
    GM887761Courtesy of GENERAL MOTORS CORP.
  1. Drain the cooling system. Refer to Cooling System Draining and Filling (Static Fill)  or Cooling System Draining and Filling (GE 47716) .
  2. Remove the cooling fan. Refer to Engine Cooling Fan Replacement  or Engine Cooling Fan Replacement .
  3. Remove the water pump drive belt. Refer to Water Pump and Air Conditioning Compressor and Power Steering Pump Belt Replacement .
  4. Remove the drive belt tensioner. Refer to Drive Belt Tensioner Replacement - Air Conditioning, Power Steering, and Water Pump .
  5. Remove the water pump pulley bolts.
  6. Remove the water pump pulley from the water pump.
    7. Fig 2: Removing/Installing Water Pump Pulley & Bolts
    GM1201096Courtesy of GENERAL MOTORS CORP.
  7. Remove the water pump bolts.
    8. IMPORTANT: Use a catch basin to collect escaping coolant.
  8. Remove the water pump and seal.

    Do not reuse the seal.

  9. Clean the water pump mating surfaces.
  10. Clean and inspect the water pump. Refer to Water Pump Cleaning and Inspection .
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.