Reviewed By James K (Colorado Springs, CO) Reviewed for a 2008 GMC Sierra —10/29/2014 6:40 PM
I bought this disable the AFM in my '08 GMC Sierra 1500 SLT 63000 miles. Instantly stopped AFM, fuel mileage went from 13.8 to 14.7 on first tank of gas. So far, works perfectly! The blue LED's on it were a distraction the first two days, but now I'm used to them (they show the status). As far as I'm concerned, you can not go wrong with this product! Shipping was blazing fast (overnight).