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HOMESERVICE MANUALSCHEVROLET2003TRAILBLAZER 4.2 S, 4WDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 1626 (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 is about a different car, the 2003 Buick Regal and 2003 Buick Century. However, it is still accessible from the selected car via links, so may be relevant.
CAUTION: Before servicing any electrical component, the ignition key must be in the OFF or LOCK position and all electrical loads must be OFF, unless instructed otherwise in these procedures. If a tool or equipment could easily come in contact with a live exposed electrical terminal, also disconnect the negative battery cable. Failure to follow these precautions may cause personal injury and/or damage to the vehicle or its components.
  1. Remove the battery. Refer to BATTERY REPLACEMENT in Battery.
  2. Drain the cooling system. Refer to DRAINING AND FILLING COOLING SYSTEM  .
  3. Remove the cooling fan assembly. Refer to COOLING FAN REPLACEMENT - ELECTRIC  .
    Fig 1: Removing Cooling Fan Assembly
    G01969641Courtesy of GENERAL MOTORS CORP.
  4. Raise and support the vehicle. Refer to LIFTING AND JACKING THE VEHICLE in General Information.
  5. Remove the lower air deflector. Refer to RADIATOR AIR BAFFLE AND DEFLECTOR REPLACEMENT - LOWER  .
  6. Use J 38185  to remove the outlet hose clamp from the radiator.
  7. Remove the outlet hose from the radiator.
    Fig 2: Removing Outlet Hose From Radiator
    G01969642Courtesy of GENERAL MOTORS CORP.
  8. Lower the vehicle.
  9. Disconnect the transaxle oil cooler pipes from the radiator.
    Fig 3: Disconnecting Transaxle Oil Cooler Pipes From Radiator
    G01969643Courtesy of GENERAL MOTORS CORP.
  10. Pull the plastic cap back from the quick connect fitting and down along the transaxle oil cooler pipe.
  11. Using a bent-tip screwdriver, pull on one of the open ends of the retaining ring in order to rotate the retaining ring around the quick connect fitting until the retaining ring is out of position and can be completely removed.
    Fig 4: Identifying Bent-Tip Screwdriver
    G01969644Courtesy of GENERAL MOTORS CORP.
  12. Remove the retaining ring from the quick connect fitting.
  13. Discard the retaining ring.
    Fig 5: Removing Retaining Ring From Quick Connect Fitting
    G01969645Courtesy of GENERAL MOTORS CORP.
  14. Pull the transaxle oil cooler pipe straight out from the quick connect fitting.
  15. Remove the radiator.
    Fig 6: Removing Transaxle Oil Cooler Pipe From Quick Connect Fitting
    G01969646Courtesy 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.