Reviewed By ryan w (Cassville, MO) Reviewed for a 2005 GMC Sierra —7/18/2017 4:54 PM
Easy to install easy to use does everything that i need it to do
Reviewed By Charles S (Walterboro, SC) Reviewed for a 2015 GMC Sierra —7/7/2017 8:36 PM
GM could not solve my idle speed issues and always said OK. After a near catastrophic crash when the motor quit during an interstate rapid stop at 70 mph I decided to fix the problem on my own. This device WORKS! Also increased my gas mileage over 1 mpg. BUY IT!
Reviewed By Kevan C (Hagerstown, MD) Reviewed for a 2012 GMC Sierra —7/5/2017 2:02 PM
Bought a pre-owned Sierra 1500 with the Vortec 6200 where the previous "computer" calculated MPG was 10.2 average. I cleared the computer, installed the MPG default tune with firm shift. With 2 tanks of regular 87 octane I now get overall "computer" average of 16.7. I will hand calculate at next fill-up.