Are you plugging something into a USB hub? If so, if the radio does not like the device/cord, try different hub locations, and different cords from hub to device. Verify the cord/device combo works on another device and can get a successful connection with the same combo. If that works/does not work then start working on eliminating the defective link/ device. Once the combination works try the hubs in the truck again.
BlueHemi1500