Reviewed By RICHARD J (Parachute, CO) Reviewed for a 2005 GMC Savana —7/13/2014 9:25 PM
Big difference in power. I get 3 to 4 mpg more when using performance level.
Reviewed By Jonathan W (Killeen, TX) Reviewed for a 2015 Chevy Silverado —6/21/2016 4:47 AM
I had bully dog before this one and it took me and my truck through the ringers. This product I should have stuck with since my first use in 2004. I love this product and will recommend to anyone.
Reviewed By Judd B (WEST LAFAYETTE, OH) Reviewed for a 2007 Chevy Tahoe —6/20/2016 12:45 PM
Was looking to firm up my transmission shift points and disable the Active fuel Management system, This unit allows that to happen. I wish the instructions were a bit more specific as to what every setting can and will do, but I guess I'll figure it all out eventually. The performance tune is a noticeable difference from your stock tune but again I wish I had more details about the tune itself.