Well, if you cant hear anything, it sounds like you have antenna problems. Check your coax ends, both inside the truck, and outside. Check your antennas, as well. Check for cracks, breaks. Look also, at the base of your antennas, where they screw into the connectors. One of the antennas may be broke loose at the base. I would just do a walk-around, and look over your antenna parts. Connectors, coax, antennas, etc..
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