New topic so I moved this to a new thread.
I have the factory remote start and it works pretty good. The horn chirps twice and the parking lights flash twice, the doors lock and then the engine starts. Once running, the parking light come on solid so I know it's running. It will run for 15 minutes then shut itself down. You can start it one more time without inserting the key in the ignition. You can turn off the horn chirp in the menu system on the dashboard.
There are some limitations in distance. If I have a clear line of site I can be further away. It consistently works at about 40 yards. My office is on the second floor so if I go over to the window closest to the truck, it will work a little further away.
If I'm in a mall parking lot and a couple of rows over with lots of cars between then I have to be pretty close, about 5 car lengths away for it to work.
Here's a crazy question for such a new truck, but have you tried a new battery in the remote?