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!