Range TechnologyRA003B AFM/DFM Disabler-Blue

This is a life saver. We were having issues with our Yukon and the lundging when taking off. Once we plugged this in that completely went away. And I love the fact it’s always in V8. And it just plugs right in and I love the light that it has on it and that u can choose the color to match ur dash.

Works great to disable the Active Fuel Management which shuts down your engine to 4 cylinders when cruising. I don't even notice any loss in fuel efficiency but do notice that the engine has power when I need it versus without this product. It also disables the stopstart. I'll never stop using this in any vehicle that I own.

Great product! Great Seller!

Works great, keeps my ‘15 Silverado in V8 mode all the time. Exactly what I wanted after replacing cam and lifters at 100k due to imo the 4 cylinder drop off. No battery draining issues.

Seems to be working but can’t really tell. My 2019 Silverado does not show v8-v4 mode like my 2014. Always ran smooth even before the install. Gas mileage seems a little lower so maybe that’s it.

Took care of the AFM problem. Cheaper way to go than going into a shop for AFM delete. Still pricier at $200+. Works with my 2017 gmc Sierra.

Was hesitant buying at first but it works , truck will last longer now

Works as described, keep the engine in V8. Smooth shifts, and runs well.