Read through this thread, and was wondering since I have a 2019 f-250 with ultimate trailer
tow, and snow plow package I believe I am capable of adding the FordPass modem without too much hassle. I would imagine it’s already wired for it. How can I order just the modem? Or will I need other parts as well?

 

Unfortunately, you read through the wrong thread. This one's 3 years old. The "Smartlink" modem was a brief thing that worked for a short amount of time before Ford discontinued it at the end of 2019. As far as I know, the only way to do this now is to add the Sync Connect TCU to your vehicle. I did it on mine, if you're able to do basic wiring and Forscan it's not that bad. There's a whole write up on it here:
https://www.f150forum.com/f118/sync-...y-ford-452708/