Safety Warning

DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.

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HOMESERVICE MANUALSCHEVROLET2003TRAILBLAZER 4.2 S, 4WDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 1896 (ENGINE COOLING SYSTEM)REPAIR INSTRUCTIONSRADIATOR INLET HOSE REPLACEMENT (HP5)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 2009 Saturn Vue. However, it is still accessible from the selected car via links, so may be relevant.

Drain the coolant. Refer to Cooling System Draining and Filling (Static Fill With HP5) or Cooling System Draining and Filling (GE 47716 Fill With HP5)
Remove the fuel injector sight shield. Refer to Fuel Injector Sight Shield Replacement (LCS)
Remove the radiator opening upper cover. Refer to Radiator Opening Upper Cover Replacement
Remove the front end guard. Refer to Front End Guard Replacement
Remove the radiator vent inlet hose from the radiator inlet hose. Refer to Radiator Vent Inlet Hose Replacement (HP5)

Fig 1: Radiator Inlet Hose & Clamp

Courtesy of GENERAL MOTORS CORP.

Using J 38185: Hose Clamp Pliers disengage the tension on the hose clamp (1) and remove the radiator inlet hose (2) from the radiator.

Fig 2: Radiator Inlet Hose

Courtesy of GENERAL MOTORS CORP.

Using J 38185: Hose Clamp Pliers disengage the tension on the hose clamp (1) and remove the radiator inlet hose (2) from the engine.
Remove the radiator inlet hose from the vehicle.

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.