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Your cart is empty.The DFM (Dynamic Fuel Management) Module is designed for late model GM Refresh trucks and SUV's. This innovative device is the first in the market to provide a solution for disabling the dynamic fuel management system in these vehicles. By installing the DMF Module, users can effectively override the vehicle's built-in cylinder management system, allowing the engine to run on all cylinders, all the time! This leads to a better driving experience, and better long term engine reliability. The 5.3L and 6.2L V8 engines offers in many GM 1500 trucks like the Silverado and Sierra and GM's most popular SUV's like Tahoe, Suburban, Yukon, and Escalade offer excellent power and fuel mileage, but have been plagued by negative side effects from the factory DFM systems for years. Excessive engine oil usage, fouled spark plugs, failed lifters and valve train components and even complete engine failure. Don't let your brand new GM V8 leave you stranded on the side of the road or stuck with an expensive repair bill. Eliminate that worry from life and install the all-new DFM Module today! This device is a true dual threat eliminating the most frustrating features your brand new truck or SUV's came equipped with, DFM and Engine Auto Start/Stop. By simply plugging this device on to your ECM, both systems will remain inactive at all times, leaving you with the peace of mind your engine will run more consistently without issues or interruption. Just hop in and drive without the worry of cylinders cutting off leaving you powerless or the engine shutting off at every stop sign, creating a hesitation on take-off or killing power to your in-cabin luxuries like A/C and rear entertainment systems. *Some vehicles may still engage 0-cylinder mode while coasting with this product installed. During extensive testing, it was found that completely disabling this function led to undesirable driving conditions and safety concerns. Disabling 0-cylinder mode while coasting resulted in a notable decrease in fuel efficiency, with a loss of 2-3 MPG, as the engine continues to fuel and fire the injectors even during coasting. This fueling also creates an unsettling sensation during deceleration, as it feels like the vehicle is still accelerating slightly, despite 0% throttle input. This requires harder braking, especially in scenarios like towing or descending a long grade, leading to undesirable driving conditions.
CHUCK
2025-09-05 10:00:34
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.
Customer
2025-07-27 12:22:33
2022.5 LT Trail Boss 6.2L.Plug and play. 200 miles since install, no issues. No more auto start/stop. Full timeV8. Love it. MPG diff is negligible if any. Make sure to pull the negative battery cable before install and the inner wheel well liner will be pushed back a bit after install but no worries. TPMS will show 0 PSI until you drive it for a bit then sensors will wake up.Buy it, install it and let er rip bud.
Phillip T.
2025-05-29 14:40:21
I disconnected the negative battery cable and installed the module. Connected the battery cable and the gauge cluster was black. Truck would not start. I disconnected the battery cable and removed the module. Truck started and has a check engine light now. Now the truck has to go to the dealer.
Larry scott
2025-04-02 10:20:15
Absolutely works great.
Scott
2025-04-01 16:03:38
I liked this it was easy to install and works like designed
Patrick
2025-02-20 14:26:46
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.
brian cornett
2025-02-18 19:02:41
Item was damaged, and packing and item where previously used . Returned immediately
Honu
2025-02-05 11:09:44
This is a must have product, 2023 ZR2 silverado. I've already had one engine failure at five thousand miles. This product will save my new engine from total catastrophic failure. The truck just runs so much better After installing. No lag or hesitation on takeoff.
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