I stumbled across this device and what a find. I hated the 4cyl. mode of my Silverado from the day I bought it. It's a much more enjoyable driving experience being in V8 all the time. Thus far according to my trucks mpg rating I haven't lost any mileage either not that I'd mind if I did it's worth losing a mpg or 2 to drive in V8.
After replacing all of the lifters and reading multiple posts about people who had to go back and replace them again because of the AFM problem I figured I would spend the $190 just to be safe. Now that I've run the truck for a few weeks it certainly seems to be doing what it supposed to do. Why does the Blue light flash on and off every once in a while?? Probably should go back and read the manual huh? Auto Anything Rocks!