Bad Pulley or Bad Serpentine Belt Squeak?

[4.8isguy]

I recently changed out my voltage regulator on my 2006 4.8is. After I put everything back together and started the car i began to hear a loud squeak that seems to be coming from either one of the pulleys or the serpentine belt. If I rev a little noise gets much louder. So I took everything apart and tried adjusting the serpentine belt a few times and didnt have any luck. I then removed belt and put it on the opposite way. The noise definitely is less loud then originally but its still there and doesn't sound great. Car has about 78k miles so I'm not sure if I should just start replacing stuff or if I did something wrong. I did inspect the belt and it does look pretty clean. I also removed the belt and spun each individual pulley and didn't hear or see anything unusual. Any thoughts? Here is some pics of what it looks like.