Works As Advertised....better than expected
Reviewed By Luther B (Warner Robins, GA) Reviewed for a 2007 Chevy Avalanche —3/29/2015 8:59 AM
Simply amazing! I've always wondered why GM incorporated this feature without allowing the driver to switch it on or off. This device is the answer to that question! Personally I've seen a noticeable difference in the power on acceleration from a stop as well as a 1 to 2 mpg increase during normal driving. If you have a GM vehicle with an active fuel management sys, this device is a must. Oh, I forgot mentioned the fact that I just spent $1350 to have two lifters replaced due to fatigue.
Does exactly as advertised!
Reviewed By John B (CONROE, TX) Reviewed for a 2008 GMC Sierra —3/27/2015 5:53 AM
I was trying to disable the AFM simply because the switch from 4 back to 8 cylinders was causing my 5.3 to burn oil. Hopefully I've gotten to it before the rings stick. The range device just plugs in and no more 4 banger. Great product and the simplicity is nice.