Reviewed By Matt J (Telford, PA) Reviewed for a 2010 GMC Sierra —8/20/2015 8:27 PM
I bought this not expecting a lot of change but I really was suprized there was a big difference and I feel mostly in any kind of launch
Reviewed By landon b (PLAINWELL, MI) Reviewed for a 2010 GMC Sierra —1/9/2015 4:29 AM
Overall a great product that is easy to use, has multiple capabilities, and flexibility in really give your vehicle a custom tune. I highly recommend have a custom tune done once you have loaded your first canned tune and put on the recommended mileage. It is the most noticeable increase in performance you will receive from this device!