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 douglas f (IRMO, SC) Reviewed for a 2018 Chevy Silverado —5/10/2018 7:37 AM
This is my third Hypertech, 2010 Silverado, 2010 Camaro & now a 2018 Silverado. I have found these programmers easy to use and quite effective. They offer quite a few options for programming your vehicle to your specific needs. My latest purchase provides the most amount of features to date. I would highly recommend this product if you want to maximize your vehicle's performance, maximize your fuel efficiency and get a solid shift out of your transmission. Hypertech customer service is helpful.