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HOMESERVICE MANUALSCHEVROLET2003TRAILBLAZER 4.2 S, 4WDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 593 (ENGINE COOLING SYSTEM)REPAIR INSTRUCTIONSWATER CROSSOVER REPLACEMENT (8.1L)REMOVAL 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 GMC Savana Special, 2002 GMC Savana Camper Special, 2002 GMC Savana, and 2002 Chevrolet Chevy Express. However, it is still accessible from the selected car via links, so may be relevant.
  1. Remove the drive belt tensioner bolts.
  2. Remove the drive belt tensioner.
    Fig 1: Removing Drive Belt Tensioner
    G01699559Courtesy of GENERAL MOTORS CORP.
  3. Drain the cooling system. Refer to Draining and Filling Cooling System .
  4. Remove the bypass hose.
    Fig 2: Removing Bypass Hose
    G01699560Courtesy of GENERAL MOTORS CORP.
  5. Remove the coolant crossover bolts.
  6. Remove the coolant crossover.
  7. Remove the coolant crossover gaskets.
    Fig 3: Removing Coolant Crossover Bolts, Coolant Crossover & Coolant Crossover Gaskets
    G01699561Courtesy of GENERAL MOTORS CORP.
  8. Remove the water outlet bolts (2).
  9. Remove the water outlet (1).
  10. Remove the thermostat (3) from the coolant crossover.
    Fig 4: Removing Water Outlet Bolts, Water Outlet & Thermostat
    G01699562Courtesy 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.