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 brian l (Orchard Park, NY) Reviewed for a 2012 Chevy Silverado —2/20/2017 5:34 PM
Great product and easy to use. Just make sure you read the card accompanying the product regarding aftermarket electronic accessories installed on your vehicle (remote starter, amp, stereo, etc). Tech support from Hypertech very helpful and friendly. Excellent experience all around.