No it's just the tune on the pre 15 models will work with the existing PCM and in 15 and newer, the factory started to encrypt the PCM's and they(the tuning companies/tuners) had "unlock" the stock PCM so it would accept the tune. You can either send the 15 and newer PCM in to the tuning company and have them unlock it for you and they will send it back to you or you can purchase a "extra" PCM that has already been unlocked and then load a tune into it. You can contact Matt at Moe's Performance about the PCM's and tuners. He, Hemifever and Diablo have an exchange program for the PCM's so your truck does not have to be disabled while you wait for your PCM to be unlocked if you decide to go that route. This is sort of convoluted but I hope you can understand my babbling.
Jay