Question about Chevrolet S 10

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Squealing under hood

S10 2.2 Squeal when heater running, does not change when fan speed changes

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  • Chevrolet Expert
  • 113 Answers

Check fan may be goiing bad

Posted on Nov 23, 2013

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Posted on Jan 02, 2017

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  • 341 Answers

SOURCE: squealing NOISE possibly from fan belt

Belts stretch from new. Try to tighten them again. Hopefully the are not glazed or this may stay with you.

Posted on Dec 14, 2008

  • 3 Answers

SOURCE: squeal from front of 2002 gmc sierra

check Idler pulley....

Posted on Jan 06, 2009

  • 1 Answer

SOURCE: 96 Trooper still squealing after changing all belts

hi my trooper did the same.would squeal then stop then the bearings for the power stearing broke had to replace that part.then when it started again about 2 years later it was the raidator fan bearings and the radiator shaft sheared so check them out.i had done 100000 miles when the power stearing broke and 1200000 miles when the radiator fan broke.

Posted on Jun 30, 2009

  • 226 Answers

SOURCE: heater fan makes a loud squeal in the first 3

Replace the motor. Lee

Posted on Oct 26, 2009

  • 43 Answers

SOURCE: My AC and Heater squeal when I turn the fan on,

Most likely it is the blower fan itself that is in need of some attention.

Posted on Dec 09, 2009

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1 Answer

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'high pitched squeal' sounds like the serpentine belt on the water pump, not the heater fan.

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The speeds are controlled by a resistor pack. Changing the resistor pack may restore full functionality. Volvo heater fans are notorious for squealing. Usually they are run at a speed that doesn't squeal. If it squeals at one speed, sometimes a different speed won't squeal. The resistors seem to eventually fail. They are fairly cheap to replace.

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Is the squealing coming from inside the car or under the hood? The A/C compressor runs when the defroster is on. If the belt is loose or worn, it will squeal. The blower is really the only moving part under the dash. If the noise is coming from there, you likely have a bad blower motor.

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Just for testing, a few seconds, will the vehicle start and run w/o the belt? Have a helper work the throttle, is the sound gone? If problem not the belt, check the belt driven accessory. Sometimes you can use a long metal rod of some kind, with belt on, one end of the rod touches accessory housing, the other end goes on that bone behind your ear, helps to magnify the sound. I guess you could use a mechanics stethoscope to do the same thing. Have helper work the throttle while you listen to each. Don't get tool or anything caught in belt. This is a serpentine belt, I haven't looked?
Maybe an accessory trying to freeze up or bad bearing? I can't think of anything else at the moment?

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2004 Kia Sorento squealing from hood


I also have an 04 Sorento and LOVE it. I live in northern indiana where it is super cold in the winters and just this year my truck started squealing when temps got low and when the heat is on. My dad has also changed the belts, even though they looked fine. that didn't fix the problem. I was searchng for some answers and it seems that many people are having this same issue with sorentos. Its super annoying and like you sid embarassing! I love my truck, but HATE this sound! if you find anything else out, please post! Thanks!

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1999 dodge durango 5.9 v8 loud squealing noise from under hood replaced tenison pulley, idler pulley, ac pulley/clutch assembley,and belt please help


You didn't mention the alternator, power steering pump, or water pump. In fact, any pulley other than the crankshaft one can have a bad bearing or dry seal. Remove the belt and spin each pulley while listening for any rough noise or squeal. If it was the crankshaft, it might be time to check the oil. Start the engine with the belt off to see if it does squeal. Make sure the noise isn't coming from the radiator fan(s).

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96 Trooper still squealing after changing all belts


sound like alternater belts you changed one may not have been as good as it should try again

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its time to replace the fan motor before it goes all the way out

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