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HOMESERVICE MANUALSCHEVROLET2003TRAILBLAZER 4.2 S, 4WDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 904 (ENGINE COOLING SYSTEM)REPAIR INSTRUCTIONSRADIATOR REPLACEMENT (2.2L)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 2003 GMC Sonoma, 2003 GMC Jimmy, 2003 Chevrolet S10 Pickup, and 2003 Chevrolet Blazer. 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 coolant recovery hose clamp from the radiator.
  3. Remove the coolant recovery reservoir hose from the radiator.
    Fig 1: Removing Coolant Recovery Reservoir Hose
    G01978200Courtesy of GENERAL MOTORS CORP.
  4. Using the J38185  reposition the radiator inlet hose clamp from the radiator.
  5. Remove the radiator inlet hose from the radiator.
  6. Remove the fan shroud. Refer to FAN SHROUD REPLACEMENT  .
  7. Using the J 38185  reposition the radiator outlet hose clamp from the radiator.
  8. Remove the radiator outlet hose from the radiator.
  9. Remove the transmission oil cooler lines from the radiator. Refer to OIL COOLER LINES QUICK CONNECT FITTING .
    Fig 2: Removing Transmission Oil Cooler Lines From Radiator
    G01978201Courtesy of GENERAL MOTORS CORP.
  10. Remove the radiator.
    Fig 3: Removing Radiator
    G01978202Courtesy 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.