AFM/DFM Disabler AG003 Pro Chevy 5.3 Silverado / 5.3 GMC Sierra Active Fuel Management Disable DOD Delete Keep Engine V8 V6 Trucks&SUVs for GM Yukon Tahoe 4.3L 5.3L 6.0L 6.2L RA003

So simple. Just plug it in (engine off) and that's it! My 2020 Tahoe Premium stays in V8 mode. No hesitation. Runs like it should. Great product.

No issues. Does as advertised. Has been installed for 4000 miles with no issues or effect on gas mileage. Two thumbs up thus far.

Works just like the more expensive options at a fraction of the cost. I have been using it for a little over a month now and it has been working flawlessly.

After researhing these "gadgets" i finally decided on this brand. It was cheap enough and i thought if it didn't work i'd just return it BUT.....much to my surprise this thing actually does what it states! My 2014 Silverado LTZ Crewcab with less than 50,000 miles (actual) wasn't the best running/shifting Silverado i have owned (previous incude 2013 and 2015) but i can say after plugging this in, it became an entirely different truck! With the AFM being disabled along with the transmission shifts now being spot on without any of the occasional "downshift clunks" coming from the rear. My city gas milage has decreased by about 1 mpg (depending on my right foot) but it runs cleaner and smother with more noticable torque than before! I have been running this device for over a month and it really did wake my 5.3 up! My next investments will be #1. MotoFab Front 2" Leveling Spacers #2. Transmission Cooler Bypass Kit and #3. K&N Air Oil Separator

Works as described, installed in 2013 Tahoe and it is amazing how smoothly the transmission shifts now… Truck seems to be running better than it ever has!!!! Great product so far

Since it wouldn't work on my 2020 Silverado, I tried it on my 2011 GMC & it worked great (so far).

Plugged into truck, lights flashed then stayed solid, as if it was working. Tried to shift into reverse to leave my driveway, and the truck would not move. Something in the transmission was locked up. Unhooked and truck seems to run as normal, but very scary experience. Returned and will look at getting my truck flashed instead.

Quick delivery and even quicker to install. Just plug and go.

Does what it says. Not to sure if it improves mileage but it shuts down the cylinder shut down

Elimina la programación AFM, y evita el daño al motor a largo plazo por los cambios de 4-8 ciiindros

Plug in and faget about it. No more cylinder deactivation. As easy as that. And no noticeable increase in gas consumption! This is for a 2016 GMC Sierra with a 5.3, but may fit others. It is totally seamless. Other than the led lights on the device, you will never know it's there.

Just as described, plugged it in no more V4 A1 product

Works good so far