Re: 5.7L Stalling on startup
Kind of funny because before even reading all of your post the first thought that came to my mind was also something to do with the key fob and keyless access/push start system. For now to eliminate the actual key fob you're using, do you happen to have the other one available? Maybe use your spare fob and see if that stops the stalling. Its a start anyway and something you can do right away without a trip to the dealer.
2015 Jeep Grand Cherokee High Altitude, Bright White, V6, HK audio