That really is poor service on RAMS part. A bumper to bumper factory warranty is supposed to be pretty much all inclusive unless there is deliberate misuse or its a wear-out part (wipers, tires). Where does it (the nickel and dime'ing the customer) stop?
It's a known issue (the FCA air ride freeze problems) but like many other makes, they decide to try and avoid covering it. So sad. If other industries tried to pull the same crap, people would be all up in arms, yet on a 50-60k (usd) truck, it's "acceptable".
I've often wondered just how many more units a manufacturer would sell if they simply covered the problems during the warranty instead of trying so hard to deny them. Even if they charged the buyer some % more for the vehicle, pretty soon the word would get out that "so and so make covers the issues, so buy that instead of the other".
About your only defense against all of this is to buy 3-5 yr old vehicles after everyone else has tested them out, but then you are always behind the curve as far as tech and safety features goes. Course you don't get the big first years depreciation shaft either. Life...