I have read most but not all of this thread in hopes of finding answers to a couple of my questions. I have a 2014 and recently purchased the Nav unit from FLTrucks. I have not yet installed it but have the following questions. Given that my truck did not come with the Nav unit (Entune Plus) will the 28 pin connecter still have the speed sensor hooked up? And I understand that the shark fin is for both GPS and Sat Radio. Even thought my truck did not come with Nav should I expect to find an unused GPS connection hanging behind the radio ready to plug into the new Nav unit or will I have to use the antenna FLTrucks sent me?