Well..........you will spend $50 on the unit then $150 to have it unlocked(it will have to be sent to SCT for unlocking). Then contact a tuner for parameters for a canned tune. Probably $200. all in all still better to buy one only if you are doing mods. Not much gain on the Reg. Cab truck with just the tune. once you introduce modifications then you contact a tune vendor and He/she will customize your tune. There is a reason somebody is selling a $500 tuner for $50. The started out at $700! You can get them for $400.. I would steer clear! That tuner should have stayed with the truck it was bought for. ...................anybody buying a used truck should ask for the tuner with it.Chances are he has it but thinks he can sell it . ..............Just my thoughts