This sounds like a CAN BUS style truck in which the computer controls the radio.  Unlike standard vehicle applications wher you could buy a interface part to get back the issues, no such parts is available for the semi.  If that is all you lost that might be okay based on the only way to fix.  The fix is a Can Bus radio.  JCV2015BT plugs into the truck and maintains all your features.  Watch the video and see what is possible.