I have a 2020 Ram 3500 diesel dually crew cab 4wd tradesman. It has the 8.4" display and came with 2 key fobs set up for remote start. The remote start never has functioned, and was not equipped with it. Why I got the upgraded key fob I do not know. I want to upgrade to a funtional remote start and add navigation. Two dealers were of no help. Hoping for some techical insight as to what can be done. Thanks for any help in this matter.