Reviewed By Tim D (Chickamauga, GA) Reviewed for a 2007 GMC Sierra —12/10/2015 6:51 AM
This is my second truck with AFM, but I couldn't tell when the truck went from 8 to 4 cylinders on my previous vehicle. This truck would vibrate and make an annoying noise when switching back and forth . The Range took care of all issues. The truck runs great and my mileage actually went UP about 1 mpg. Not sure how that's possible, but it's the truth. For about half of the price of a tuner, it's a great value as well. I would recommend the Range to anyone with AFM issues.