someone told me that with sct tuning u can tune a couple different programs onto a programmer type deal and tune your truck to one of the tunes that you want...

 

Not sure if it will hold multiple CMR tunes but you need to have the handheld and find a SCT CMR tuner and let them tune it in person or VIA Email, with the Email tune you just download it to your handheld and download it to the truck. Check out the vendor section for tuning or google unleashed tuning.

 

a custom tune is alot cheaper... haha