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HOMESERVICE MANUALSCHEVROLET2003TRAILBLAZER 4.2 S, 4WDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 1725 (ENGINE COOLING SYSTEM)REPAIR INSTRUCTIONSRADIATOR REPLACEMENT (BODY VIN CODE 3)REMOVAL PROCEDURE
2003 Chevrolet TrailBlazer 4.2 S, 4WD

Removal Procedure

2003 Chevrolet TrailBlazer 4.2 S, 4WDSECTION Removal Procedure
WARNING: This page is about a different car, the 2002 Oldsmobile Bravada, 2002 GMC Envoy XL, 2002 GMC Envoy, and 2002 Chevrolet TrailBlazer. However, it is still accessible from the selected car via links, so may be relevant.
  1. Drain the coolant from the radiator. Refer to Draining and Filling Cooling System .
  2. Recover the refrigerant. Refer to REFRIGERANT RECOVERY AND RECHARGING in Heating, Ventilation and Air Conditioning.
  3. Raise the vehicle. Refer to LIFTING AND JACKING THE VEHICLE in General Information.
  4. Remove the lower radiator support shield, if equipped. Refer to RADIATOR SUPPORT SHIELD REPLACEMENT in Frame and Underbody.
  5. Remove the transmission cooler lines from the radiator.
  6. Reposition the outlet radiator hose clamp using J 38185  .
  7. Remove the outlet radiator hose (1).
    Fig 1: View Of Radiator Hose
    GM750179Courtesy of GENERAL MOTORS CORP.
  8. Lower the vehicle.
  9. Remove the cooling fan and shroud. Refer to Cooling Fan and Shroud Replacement .
  10. Remove the radiator support diagonal brace. Refer to BRACE REPLACEMENT - RADIATOR SUPPORT DIAGONAL in Body Front End.
  11. Remove the coolant recovery line from the radiator.
    Fig 2: View Of Radiator Hose Clamps
    GM753673Courtesy of GENERAL MOTORS CORP.
  12. Disconnect the radiator side panels from the shroud (1).
    Fig 3: View Of Condenser
    GM753683Courtesy of GENERAL MOTORS CORP.
  13. Remove the radiator.
  14. Remove the bolts retaining the condenser to the radiator.
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.