The radio has been acting up for a while now. The volume control wont lower or raise correctly. Volume will go up or down regardless of which way I am turning the dial or which steering wheel volume button I push. Now the CD changer cycles through all the discs each time the truck is started, does it if radio is off or on, very annoying, and there are no CD's in it. One CD got stuck a while back and took forever to get it out. And the CD player skips badly. Can this unit be sent anywhere for repair? I would prefer to keep it original if possible, but am open to an aftermarket head unit as long as I dont have to cut anything up.