[RayChez1]

It could be the radio if the coach was not moving, but if it was rolling I used to have a problem like that when the coach was brand new and it was annoying. Took it to a dealer and what they found was the small resilient pads that guide the slide in straight. And on mine it was right behind the drivers seat. So what they done, they ground off about an eighth of an inch off the pad and the chirping stopped.