Not really possible since Programmers marry themselves to a single vehicle..
so if someone had a programmer and was using it on their truck they could not do your truck.
So if you want to turn off AFM you need to buy your own device.
AFM = Active Fuel Management (2007-2013 AVYs) which is where the engine goes from 8 cyl down to 4 cyl when driving steady speed... it has been linked to engine lifter issues and oil usage see problems engine section