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blazer squealing

1999 CHEVROLET BLAZER
6 CYL • 4WD • AUTOMATIC
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MATTDEMO
  • MEMBER
  • 1 POST
i have a 99 blazer and sounds like the belt squealing replaced belt, tensioner, tensioner pulley, idler pulley, alternator. replaced water pump and noise went away but after running for 15 min it came back. please help!!!!!!!!
Mar 27, 2011 at 4:27 PM
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WRENCHTECH
  • ✓Experienced Mechanic
  • 20,760 POSTS
get a spray bottle with some water in it and when you hear the noise, spray a little on the belt and see if the noise disappears. If it does, then you still have a belt problem. If not, look elsewhere.
Mar 27, 2011 at 4:58 PM
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SAM.SMALL
  • MEMBER
  • 2 POSTS
Iv personally put 3 new belts on and everyone makes car squeal but water stops it for 5 minutes. Also iv changed tensioner 3 times and didnt fix problem.
Apr 7, 2026 at 3:51 AM
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STRAILER
  • ✓Experienced Mechanic
  • 55,676 POSTS
It must be the tensioner is to weak so I would replace that first. The other option is the pulleys are dirty or you have one accessory that is hard to turn, I would remove the blet and spin everything by hand to check for resistance.
Apr 8, 2026 at 2:24 AM
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