Range DFM Disabler Module | Fits 2021-2024 GM SUV and 2022.5-2024 GM 1500 Truck | with Midwest Aftermarket Decal

Works perfectly. This shuts down the Auto Start/Stop and has the truck running on all 8 cylinders, except when coasting. It took me less than a minute to install without removing my tire nor inner fender.I have not seen a drop, maybe even an increase, in fuel economy and i travel over 50 miles daily to work and another 50+ home. The few times i have driven in town i did see a drop in mpg but once back on the highway it goes right back up. The instant V8 power is there and it “feels” smoother while driving it.To me this isn’t worth the cost if you never get out on the road because it doesn’t kick in unless you get up to 40 mph. Thus driving through the neighborhood and stopping at the local grocery then back home it would be useless.I have it on my 2024 GMC SLT 6.2L with the X31 package.

Works as it should, super easy install

1 month in and this has been the best purchase I could have done for my 2022.5 Silverado Chevrolet 1500 RST. It makes the V8 come alive and my fuel mileage went from an average of 15 MPG on the highway, to the highest of 20 MPG which pays for itself! Definitely recommended!

DONT BUY! This is a piece of junk and will cause issues on your truck. I installed on my Chevy Silverado 2023 RST back in Feb 25. When installed my Front Collision Detection light stays on and doesn’t function and it disables my lane change assist. When I take it off everything goes back to normal. Called Range Tech and they want me to take picture of it installed and send it to them which blows my mind. I asked if this was an issue that they were aware of and was told no this was the first time someone contacted them with this issue, which is a flat out lie as i’ve seen numerous reviews about this.

This product performs as I expected.

Bought this for my 2024 GMC Sierra Denali Ultimate 6.2L V8.1. Fixed DFM issue. I was unlucky with my truck in that it has rough vibrations at highway/coasting speeds. After taking it to the dealer, they found nothing, no codes, and did not acknowledge that anything was wrong. After playing around with things and putting the truck into L9 instead of Drive, the rough vibrations stopped. My research shows that L9 turns off the DFM for my model. The problem is that I’m limited to 9 instead of 10 gears. Another problem is that I have to put it into L9 every time I start it or shift into reverse. This Range unit shuts off DFM entirely and I haven’t noticed anymore of the rough coasting. My guess is that my truck’s DFM is defective and I just had some bad luck. Highway mpg (75mph cruise control) increased to 22mpg from 18mpg after shutting off DFM. This is probably not typical for everyone.2. Shut off auto start/stop, but the button light still lights up. Nobody wants auto start/stop, it’s a dumb feature, and worsens my overall MPG. The manufacturers want to force it to turn on because they know everyone would shut this stupid, annoying, and useless feature to stay off. It’s off for good now and my truck feels acts how a 6.2L V8 should act.

I purchased this module directly from Rage Technologies, but don't see a place for reviews on their website so I'll put one here.Pros: The module is easy to install and does work with respect to disabling the DFM. I didn't notice any difference in fuel economy with this module installed.Cons: The module does not eliminate the 0-cylinder mode, so as you coast to a stop, the truck will essentially shut down the cylinders and then start them again once you are under a certain speed. I really dislike this behavior, hence the three-star rating and since the truck is now under a recall, I removed the module and may not reinstall it.

Easy to install directly to the ECM. I even got 3 - 4 miles per gallon. I read all the facts about going from 8 - 6 - 4 cylinders while driving...it causes lifter problems and oil consumption. So I purchased this to keep my engine in 8 cylinders mode at all times and it also stops that annoying auto shut-off! Great product for 2022.5 - 2024 GM vehicles with 5.3L.