My truck keeps make a squeal from the engine.

What is your question?

I have taken my 1998 chevrolet 1500 pickup to 2 different mechanics. I've had the alternator worked on, fan belt changed twice (because I was told that it might have the wrong fan belt on it), and bearings worked on. Some times it will stop and then start up again after it has been worked on. At first it sounds like a bird tweeting then it gets sort of loud. Also, I have noticed that if I were to pour water on the fan belt while the truck is running it stops but it soon starts up again.