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 David B (Wood Dale, IL) Reviewed for a 2017 GMC Sierra —3/13/2017 9:18 PM
Item shipped immediately. Really like the compact design. Shows lots of customization information about my Duramax. Intead of windshield mount I used a shot ram mount with ball to attach to the driver grab handle. Mounts out of the way but easy to see.