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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)INSTALLATION PROCEDURE
2003 Chevrolet TrailBlazer 4.2 S, 4WD

Installation Procedure

2003 Chevrolet TrailBlazer 4.2 S, 4WDSECTION Installation 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. Install the condenser to the radiator.
    NOTE: Refer to FASTENER NOTICE in Cautions and Notices.
  2. Install the bolts retaining the condenser to the radiator.

    Tighten:  Tighten the bolts to 28 N.m (21 lb ft).

    Fig 1: View Of Condenser
    GM753683Courtesy of GENERAL MOTORS CORP.
  3. Install the radiator.
  4. Install the cooling fan and shroud. Refer to Cooling Fan and Shroud Replacement .
  5. Raise the vehicle.
  6. Install the outlet radiator hose (1).
    Fig 2: View Of Radiator Hose
    GM750179Courtesy of GENERAL MOTORS CORP.
  7. Reposition the outlet radiator hose clamp (1) using J 38185  .
    Fig 3: View Of Radiator Hose Clamps
    GM753673Courtesy of GENERAL MOTORS CORP.
  8. Connect the transmission cooler lines to the radiator.
  9. Install the lower radiator support shield, if equipped. Refer to RADIATOR SUPPORT SHIELD REPLACEMENT in Frame and Underbody.
  10. Lower the vehicle.
  11. Install the coolant recovery hose to the radiator.
  12. Install the radiator support diagonal brace. Refer to BRACE REPLACEMENT - RADIATOR SUPPORT DIAGONAL in Body Front End.
  13. Fill the cooling system. Refer to Draining and Filling Cooling System .
  14. Inspect the transmission fluid level.
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.