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HOMESERVICE MANUALSCHEVROLET2003TRAILBLAZER 4.2 S, 4WDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 738 (ENGINE COOLING SYSTEM)REPAIR INSTRUCTIONSSURGE TANK 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 2002 Chevrolet Malibu. 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. Using the J 38185,  reposition the hose clamps at the surge tank.
  3. Disconnect the hoses.
    Fig 1: Locating Hose Clamps
    G01811350Courtesy of GENERAL MOTORS CORP.
  4. Disconnect the low coolant switch electrical connector from the surge tank.
    Fig 2: Disconnecting Low Coolant Switch Electrical Connector
    G01811351Courtesy of GENERAL MOTORS CORP.
  5. Disconnect the coolant return hose.
    6. Fig 3: Disconnecting Coolant Return Hose
    G01811352Courtesy of GENERAL MOTORS CORP.
  6. Remove the radiator surge tank bolt and tank.
  7. Remove the low coolant switch from the tank.
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.