Does Diablosport make a tuner that does work on the Classic? And/or which one would you recommend if I am looking to help mpg and my towing abilities the most? I just want it to preform a little better, especially after i put on a new cai.

Does this include the 2007 GMC Sierra Classic? Because I am having problems tuning it with it freezing when it starts to read original settings.

I can get all the way to picking a tune but when I do then it freezes at 0% when trying to read the backup. I don't understand what I am doing wrong?

BBrown88 wrote:Thanks for the help. Got it working

What did you do to get it to work? I am having the same problem now.