I Received the testing Carbyte AFM/DFM disabler several weeks ago. Thanks for allowing me to test it with my 2025 AT4X, 6.2.
First impression: The packaging is very professional and top quality. The disabler, smaller than anticipated, has a quality look and feel.
Carbyte Installation: It was very easy, just plug and play. It has a low profile that once installed, you forget it's there. The lights on the devise are not an issue with the flashing. The only time I can see it is when I look down on the floorboard.
The app: Was very easy to use and does not require a password, thank goodness! It’s a clean and easy app to navigate, no convoluted display, just the essentials, Connect, Cyl Mgt, Auto S/S and DTC. The DTC is a bonus!
2+ weeks in use:
The AFM OEM light is always on, cannot turn off the light when pressing the button. I was not sure it was working until the first stop sign. It was just confusing for a minute until I knew it was working. After that, I forgot the button was there. I had one time that the AFM did not work at a stop. I am not sure what caused it, but I connected my app to the Carbyte, and everything was working again. I’m not sure if it’s one off. From what I understand, you don’t have to connect to it every time you start the car.
The DFM: I am unfamiliar with the 6.2 and GMC, went from a Toyota Tundra to a 2024 Corvette 6.2L, and 2025 AT4X 6.2L, so, still learning the feel of the engine in both vehicles. The DFM on the corvette was seamless at times, however, I am noticing it more and more with more miles on the car, over 12k miles at this time. The AT4X only has just at 3k currently, and it’s hard to compare when you have a Corvette, because everything seems slow when jumping into the truck after driving the vette. But I did start to notice a slight difference with pedal response. The slight delay seems gone. Now I need one for my vette
Milage: I see a slight difference, however I don’t have a lot of miles on my truck, so cannot see a lot of difference. However, most people that want to buy a heavy truck, with a gas guzzling V8 engine, do not care about gas milage.
Pros: It does work, and it works well. Easy install and easy to use app. When service is needed at the dealer, it’s very easy to remove and reinstall after.
Cons: The occasional, AFM stops working, not sure if this is a one off, but will keep an eye out. Lower gas milage, but as it stands, I’m not sure how much I lost mpg, however, it’s small.
I'm happy with the product and look forward to an followup in a couple of months.
