You should be able to "flash" the original vehicle it was intended for indefinately. "Flash" referring to retuning your vehicle. Now to get it to work on a different vehicle ( if I understand this right) requires an unlock from SCT EACH time it is switched to a different vehicle. With a total of 5 unlocks. If it's set up for your truck now, you have 4 left. I'm sure someone will correct me if I'm wrong but I think thats how it is.