Brake Problem?????

[PureChevy]

I think there is something wrong with my brakes, or something up front. While moving, my truck makes an awful squealing noise. I took it into the shop and they checked my brakes and said everything looked fine. Said there was a glaze on the pads that was causing the squealing. I dont think they heard the same squeal that i am hearing. The one thing that makes me think it is the brakes is that the squealing stops when i apply the brakes.

any suggestions? I am going to have to take it back in and would like to be able to give them some ideas.

thanks