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HOMESERVICE MANUALSCHEVROLET2003TRAILBLAZER 4.2 S, 4WDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 671 (ENGINE COOLING SYSTEM)REPAIR INSTRUCTIONSRADIATOR REPLACEMENTREMOVAL PROCEDURE
2003 Chevrolet TrailBlazer 4.2 S, 4WD

Removal Procedure

2003 Chevrolet TrailBlazer 4.2 S, 4WDSECTION Removal Procedure
WARNING: This page does not describe the selected car, but rather 7 other vehicles, including the 2002 GMC Yukon XL, 2002 GMC Yukon, 2002 Chevrolet Tahoe, 2002 Chevrolet Suburban, and 2002 Chevrolet Avalanche. 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. Fig 1: Radiator Inlet & Outlet Hoses
    GM659469Courtesy of GENERAL MOTORS CORP.
  2. Reposition the inlet hose clamp from the radiator.
  3. Remove the inlet hose from the radiator.
  4. Reposition the outlet hose clamp from the radiator.
  5. Remove the radiator outlet hose from the radiator.
  6. Remove the lower fan shroud. Refer to FAN SHROUD REPLACEMENT - Lower .
    7. Fig 2: View Of Surge Tank Inlet Hose & Radiator
    GM404039Courtesy of GENERAL MOTORS CORP.
  7. Reposition the radiator vent inlet hose clamp from the radiator.
  8. Remove the vent inlet hose from the radiator.
  9. Remove the engine oil cooler lines from the radiator. Refer to Engine Oil Cooler Hose/Pipe Replacement (2WD)  or Engine Oil Cooler Hose/Pipe Replacement (4WD) .
  10. Remove the transmission oil cooler lines from the radiator. Refer to TRANSMISSION OIL COOLER LINES .
    11. Fig 3: Identifying Radiator Bolts
    GM660895Courtesy of GENERAL MOTORS CORP.
  11. Remove the radiator bolts.
  12. Remove the radiator from the vehicle.
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.