2011 Colorado 5.3 V8
Seems to work well. It is still a little early to be able to tell. Instalation was easy. I could tell a difference between the different types of tunes. The milage that I was getting on the highway was terrific to start with and I haven't had a chance to go on a road trip since changing the tune. Around town it is so hard to tell because of all the various conditions.
still working the kinks out of things
Love the product just wish I could actually get the preloaded tunes like it said it had on there....only problem is that my colorado is not yet supported. Hopefully, in the near future, things will get updated for this truck. But otherwise I have faith in the product. Keep up the good work.