My Truck died!

Sounds like the computer to me Tike. I think they are specific to your truck. Get the Mopar number off of it and Google it. Sometimes other units will work. I know on my 92 Cummins, it is specific. I had to remove it and send it out for repair. $189 IIRC
Also, pull all the connections and clean them with electronics cleaner spray and use diaelectric grease when you reassemble. Try that first.