SYS.OK|MANUAL.DB● LIVE
HOMESERVICE MANUALSCHEVROLET2003TRAILBLAZER 4.2 S, 4WDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 818 (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 8 other vehicles, including the 2003 GMC Yukon XL, 2003 GMC Yukon, 2003 Chevrolet Tahoe, 2003 Chevrolet Suburban, and 2003 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. Position the inlet hose clamp from the radiator.
  3. Remove the inlet hose from the radiator.
  4. Position 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  .
    Fig 1: Removing Inlet And Outer Hose From Radiator
    G02117827Courtesy of GENERAL MOTORS CORP.
  7. Position 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 PIPE/HOSE QUICK CONNECT FITTING  .
  10. Remove the transmission oil cooler lines from the radiator. Refer to TRANSMISSION OIL COOLER LINE QUICK CONNECT FITTING in Transmission 4L80E or TRANSMISSION OIL COOLER LINE QUICK CONNECT FITTING in Transmission 4L60E.
    Fig 2: Removing Vent Inlet Hose From Radiator
    G02117828Courtesy of GENERAL MOTORS CORP.
  11. Remove the radiator bolts.
  12. Remove the radiator from the vehicle.
    Fig 3: Removing Radiator From Vehicle
    G02117829Courtesy of GENERAL MOTORS CORP.
RENDER: 1.0x

NO RELATED

Recommended Tools & Savings

Use the Manual With the Right Hardware

Pair factory procedures with proven DIY tools so the instructions are easier to execute.

Affiliate disclosure: We may earn a commission at no extra cost to you.

Shop Manual-Ready ToolsFree Quote CheckQuote Shield Pro

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.