Since the current thread has been closed, I guess I can ask the question here. For Livernois: I'm interested in getting the 'n/a tuner' for my 15 XLT. Is it my understanding that the full array of tunes will be available in the tuner that I order? Also, I'm really interested in the 'tire size' function. Your information on this says, " Where available". This means what(?) and will this feature be included in the turner I may order? Also, I already have a K&N cold air installed if that is necessary information.