Q: High Pitched Squealing

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Hello, I have been having some squeaking coming from my belt when slowing down and idling so I checked my belt and it was looking old/cracking. I replaced the serpentine belt and now my truck is constantly emitting a high-pitched squeal and gets loudest when accelerating. I opened the hood a put a bit of water on the belt and the sound stops for about 5 seconds. I did some research and it says, "if your belt is squeaking and stops when water is put on it then you need to replace your belt or you have a belt misalignment." Well I just replaced my belt and upon inspection I do not see an obvious misalignment. If anyone can help me with this I would really appreciate it, the squealing is driving me nuts to the point where I may just take it to a mechanic to stop it, but I would rather not spend that amount of money.

My car has 160000 miles.
My car has an automatic transmission.

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