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HOMESERVICE MANUALSCHEVROLET2006CHEVY EXPRESS G2500, VAN CARGO, 6.6 2REPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 620 (ENGINE COOLING SYSTEM)REPAIR INSTRUCTIONSTHERMOSTAT REPLACEMENT (4.3L ENGINE)REMOVAL PROCEDURE
2006 Chevrolet Chevy Express G2500, Van Cargo, 6.6 2

Removal Procedure

2006 Chevrolet Chevy Express G2500, Van Cargo, 6.6 2SECTION Removal Procedure
WARNING: This page is about a different car, the 2003 GMC Sierra, 2003 GMC Cab & Chassis Sierra, 2003 Chevrolet Silverado, and 2003 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 .
  2. Loosen the air cleaner outlet duct clamp at the mass airflow/intake air temperature (MAF/IAT) sensor.
    Fig 1: Air Cleaner Outlet Duct
    G02109119Courtesy of GENERAL MOTORS CORP.
  3. Remove the positive crankcase ventilation (PCV) hose.
    Fig 2: Remove Positive Crankcase Ventilation (PCV) Hose
    G02109120Courtesy of GENERAL MOTORS CORP.
  4. Remove the air cleaner adapter nut.
    Fig 3: Remove Air Cleaner Adapter Nut
    G02109121Courtesy of GENERAL MOTORS CORP.
  5. In order to remove the air cleaner outlet duct, pivot the duct upward until the hinge clip releases from the lip on the throttle body.
    Fig 4: Remove Air Cleaner Outlet Duct
    G02109122Courtesy of GENERAL MOTORS CORP.
  6. Reposition the inlet hose clamp at the water outlet.
  7. Remove the inlet hose from the water outlet.
    Fig 5: Remove Inlet Hose
    G02109123Courtesy of GENERAL MOTORS CORP.
  8. Remove the water outlet studs.
    Fig 6: Remove Water Outlet Studs
    G02109124Courtesy of GENERAL MOTORS CORP.
  9. Remove the water outlet.
    Fig 7: Remove Water Outlet
    G02109125Courtesy of GENERAL MOTORS CORP.
  10. Remove the thermostat.
  11. Clean the sealing surface of the water outlet.
  12. Clean the sealing surface of the intake manifold.
  13. Remove and discard the O-ring seal.
    Fig 8: Remove Thermostat
    G02109126Courtesy 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.