AFM/DFM Disabler Active Fuel Management AFM Disable Device Compatible with V6 & V8 GM Motors

Works perfect on my 17 Suburban. Buying a second one for our 17 Tahoe. Not a single issue. Plug and play, and simply works.

I purchased this for my 2017 Tahoe LS and it works as advertised. I plugged it in this morning before leaving for work and it stayed in V8 mode the whole drive and seemed to make acceleration and shifting smoother than before. Gas mileage increased slightly from averaging 16.0 mpg city to averaging 16.8 mpg city. I have not seen any alerts pop up like other users have experienced but it is still early. The blue activity lights on the device turned off when I turned off the vehicle so i don't think it will drain the battery while sitting.Update: 2000 miles later and it's still working great. No issues.

Works as advertised. Stick it in the OBD port and drive. That simple. Unlike some I’ve seen discussed, in my 2007 Suburban LTZ it does not use power when truck isn’t being operated.

This is my second purchase of this item and i am extremely satisfied with it. It works as intended. We leave it plugged in at all times an have never seem a battery drain issue. Works as intended and keeps my Tahoe from going into 4 cylinder mode. Save your money on the well known brands and buy this one.

I bought this to address a stabilitrack error I was getting that seemed like it might be related to the AFM issue on 2007 GMC Sierra 1500s. When that error happens, the engine runs really rough and it shifts hard. When I first started using it, it felt like the engine was still riding just as rough, but I wouldn't see the check engine light or error pop up, and the shifts felt normal. After a while it felt like all the cylinders were banging again, and the truck was running great. I drove it a handful of times, and it felt like it might be a permanent solution. But two rides later, I felt the engine running rough again. Still no stabilitrak error or hard shifts, but it definitely felt like i was down a cylinder. Then I got a new battery and put high octane gas in and the truck has run well in the week or so since. So I think it's working? I'll need to pull it and see what happens at some point. Even if it does work, I wish I'd have put the money for this towards a tuner that could shut down AFM for good and also give me performance options.

Works on my 2008 Silverado with the 5.3. So far so good. Runs smoother and stays in v8 mpg not much difference but feels like the truck supposed to feel like.

Works as described. Notable difference in shifting, especially at low speeds. Totally meets all of my expectations (2015 chevrolet silverado )

The V4 function in my truck was driving be bonkers. It would studder a lot when accelerating and the constant switching back and forth between V4 & V8 was making me crazy.I noticed an immediate difference when I plugged this into my 2014 Silverado 5.3L. There's this road in town I travel on and usually my truck would shift hard as I accelerated to 40mph. I tried it again with the AFM delete and now the shifting is a lot smoother and it stays in V8. The overall acceleration feels way better now.I'm not sure if I feel a difference in pedal response, so in the future ill probably get a cold air intake and possibly a pedal monster/commander.