You'll need this
https://www.allmoparparts.com/sku/82213587.html
Ram changed the rf hub in 2017+ truck's that have a built-in antenna and are capable of remote start by adding the sales code. They also basically use the same baseline keys just changed the skin on them for remote start equipped truck's so that's why for anyone adding remote start to 2017+ trucks it's real easy. Alphaobd developer is working on a fix so people with 2013-16 trucks can program new baseline rf hubs. He has been able to get the high line rf hubs to work or baseline to work but not both. He's working on that fix. Since more people are interested in adding push button start with the proximity features then just remote start he kept that available. So the install for the remote start is a bit more involved and will definitely require a trip to the dealer to have them install the rf hub and program the keys and add the sales code
2018 2500 6.4L Tradesman