You can buy another PCM to send away,as long as it's a compatiable used pcm,that way it's just a matter of swapping pcm's,and your truck isn't down for a couple weeks waiting for your factory pcm to be unlocked and returned. If all you want to do is raise the idle rpm,and maybe open up the speed limiter,and you don't want to mess with the stock tune parameters,a Diablo is probably you're better choice,as it's fairly user friendly in regards to just raising the idle rpm,if you were going to tune it and do a few mods to it down the road,then HP Tuners is the better option by far.