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 Stephen J (MCRAE, AR) —4/29/2015 7:45 PM
Easy to download from the disc and update the Programmer for my vehicle. So far with the first tank of gas the mileage has improved about 1.5miles per gal. Runs smoother. Don't know about how it will do with my camper yet but will soon find out in a few weeks.