AFM/DFM Disabler Active Fuel Management Device AFM DFM Delete Compatible with V6 & V8 GM Motors AFM DFM DOD Disabler 5.3 Silverado

Works well, stays in v8 mode, no more acceleration lag at takeoff, mpg may have suffered by 1 mpg, easy to install

work very well keeps my truck in v8 mode all the time and running smother and a bit better on gas would highly recomend great price

I drive a 2017 Chevy Silverado with the 5.3 V8. This device is super simple to install and it starts to work right away. Keeps the vehicle from dropping to 4cyl to 8cyl which over time is hard on the engine. This product is especially helpful with city driving or if your driving short distances. I noticed a big difference right away. My only regret is not getting it sooner! Highly recommend.

After ordering and purchasing my new 2016 5.3 Silverado it began having issues with the AFM system. The truck became unbearable to drive as it would constantly be bogging itself down while driving and dropping and then adding cylinders. Chevrolet said it was supposed to be "seamless" and you would hardly notice it while switching from 8 to 4 cylinders and back and forth. Nothing further from the truth ! I was so Irritated with this system that I was ready to get rid of the truck. Then a mechanic friend told me about the AFM Disabler. As a last resort I purchased and Installed it. What a difference it's made in the drivability of my truck now ! Just plug it into the computer module under the dash and go. That Simple ! My truck now seems to have better acceleration, NO bogging down, and shifts through the gears much smoother .. and DOES NOT allow the Back and Forth cutting of cylinders like the AFM did. Gas mileage has stayed about the same (It's a truck) which was another plus for this little unit. I had heard though, that if you leave it plugged in for an extended period of time it could run your battery down. I've never done that, so I can't really comment on it. However, this disabler has saved me from getting rid of my truck (because of the AFM) and let's me enjoy the power of a V8 truck (the way it's supposed to be).

Worked well for 2 years then started messing up the electronics-truck would not start, door/seatbelt chimes would not work, etc.

I began using this in January and didnt notice any appreciable difference if FE or performance. I did notice that the Start/Stop light didn't go off although the description says this disable Start/Stop. I live in rural northern Michigan so I do little "city" driving and last week (March) for the first time I stopped at a traffic light and the vehicle shut off. At this point I dont know if the device is working at all, the only thig I notice is at start up the blue lights on the device flash and then three stay illuminated. I'm back to selecting L8 (which disables AFM/DFM) and mauually turning off Start/Stop every key cycle.

I have had this for a week now works great. I can tell the difference with the throttle responsiveness which is nice. I do wish that I knew what all the lights did on it. There was no directions other than plug it in and drive.

Product works as advertised

Fonctionne parfaitement. Le mode V4 totalement désactivé !

De verdad borra el lag de el modo que se apagan los cilindros

I bought this dabler for my 2014 gmc sierra with a 5.3l v8. So far it works great! the truck is now shifting smoother because its not having to shift due to afm kivking on or off, and certainly saves wear and dear on the torque converter this way. my gas milage has decreased slightly on the highway as expected, but not ebough to really be an issue(i.e 11.5 liters per 100 kms instead of 10.9 l per 100 km difference), but i've noticed something else. my gas milage in-town has vastly improved. The one thing i will warn you as i found out the hard way a couple nights ago in our -40 cold snap in Alberta, you must unplug this module when it gets down below -30 celcius, or it may wreck the module and kill your battery in the process. luckily after mine warmed up for 24 hours, it is working again.

Fonctionne très bien pour l’instant 👍

Desde que lo instalé la camioneta es más suave y no entra en modo de desconexión de cilindros.