Does the squak happen when you put your foot on the brake when coming to a stop (like when coming up to a intersection and you press down kinda of hard to get it stop right toward the end of the stop...if that made any sense...)?
I am having the same problem with my truck. The serpentine belt is only 4 months old. Thought it was the alternator, so replaced it. That wasn't it. It didn't squeak for the first minute I had it started after replacing the alternator, but then it started again. Squeak and slight growl that comes with it sometime changes slightly when turning the wheel. Same frequency when revving, but speed of the sound increases with rev. Replaced idler and tensioner pulleys..that wasn't it, either. Need help with this please! it's getting annoying!
I recently just fixed this problem on my truck, a friend of mine is a mechanic and gave me some belt lube and I applied it to the main belt. Afterwards the noise died down a bit, but was still noticeable so I got underneath the truck and applied some more of the lube to the other smaller belt. Once that was done the squeak was gone. It only made the noise in the mornings when it was really cold. Hope this helps.
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