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 Craig B (YUBA CITY, CA) Reviewed for a 2012 Dodge Ram —11/9/2017 12:20 AM
This a great tuner. I installed it when I upgraded my tires from stock to 35" mud tires and my truck doesn't even feel like it has larger tires installed. Also Bully Dog tech support is nice and easy to work with.