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OVERHEATING 2004 CHEVY TRAILBLAZER - Cars & Trucks

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The first thing I would do is flush the cooling system with a quality flush. I would inspect the radiator for leaks and back wash it to remove built up dead bugs/dirt. I would make sure the fan was coming on and operating properly. I would inspect/change the thermostat. I would consider changing the water pump if the above does not work. While you are there change the hoses and serpentine belt.
Don't reuse the antifreeze, replace with new after a complete flush. Use the proper mix/type for your vehicle.

I recently did all of the above on 1995 Ford 4.6L because of overheating and found the parts were oem! The water pump had no fins left on the impeller and the thermostat was partly missing. Very neglected system and the antifreeze looked like sun tea. Yours may not be that bad but you never know.

Posted on May 03, 2017

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Posted on Jan 02, 2017

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