Alright, here is the deal. I have an XJ and my dad has a Grand Cherokee. He thinks these type of sites are full of crazies that only action in life is to give bad info to people just to ruin their vehicles!!
This is his prob,
His belt started squealing(or so he thought), took it to the dealer. Dealer said "needs a new belt". Okay, fine. Two weeks later, same thing.
Takes it back, "needs a new pulley". Okay fine, only this time replaces it himself (very automotive inclined. just gettin on in years and has like NO patience).
Three weeks later, same thing. Only now he thinks it is coming from the Passenger's side front wheel well. I checked but it never does it for me. Anyone have this happen? is so what can I check?

 

what pulley did he replace

 

I'll find out for sure.