Reviewed By Allan R (Byron, MN) Reviewed for a 2007 Chevy Silverado —5/27/2015 3:42 PM
truck had problems with rpm fluctuation between 40-50 mph. ran the 87 octane tune and it pretty much took care or it. Didn't see a huge hp gain but the tune for the shift points and pressure was well worth it. Should have bought one years ago. Have a 07 Silverado new body style.