FullBurn™ AFM/DFM Disabler Module
FullBurn™ AFM/DFM Disabler Module
Stops your engine dropping to 4 cylinders and switching back hundreds of times a drive - no tune, no flash, nothing removed.
Ends the lurch, drone and hesitation from switching
- Plugs into OBD-II - no ECU reprogramming
- Installs in 5 seconds, unplugs with no trace
Does it have the 10-speed automatic?
Pick your vehicle. We'll tell you straight away.
In stock - Ships On Thursday, November 05-
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AS FEATURED IN
Your V8 keeps dropping to 4.
AFM shuts off four cylinders at light throttle, then brings them back the moment you ask for power. On a normal drive that switch happens hundreds of times. That's the drone, the lurch and the hesitation you feel.
With AFM / DFM
AFM drops cylinders 1, 4, 6 and 7. DFM (2019+) goes further: it re-picks the firing pattern up to 80 times a second.
With FullBurn™
All 8, all the timeFullBurn sits on the OBD-II port and holds the engine in full-cylinder mode, so the switch command is never sent. No tune, no flash, nothing removed.
Installs in 5 seconds. No tools.
Plug it into your OBD-II port
It's the same port a mechanic's scanner uses, under the dash on the driver's side. Push it in. That's the install.
Check the two lights
Drive
Leave it in for daily driving. If the truck will sit for more than a few days, unplug it like any OBD-II accessory.
Unplug it before a service visit or an emissions test, then plug it back in afterwards. Five seconds each way, and nothing is left behind.
Will it fit? Check before you buy.
Pick your vehicle. You get a straight yes or no before you order.
Yes — it fits.
FullBurn is listed for your .
Not compatible — please don't order.
:
Installed on an unlisted vehicle it won't work and may set a fault code.
One thing to check first
:
Not compatible: 10-speed transmissions · 2022.5+ Silverado 1500 / Sierra 1500 · 2021+ Suburban / Tahoe / Yukon
Vehicle not listed? Don't install it.
Three ways to stop AFM. One you can undo.
A tune and a mechanical delete both work. Here's what each one costs you in money, time and what's left on your truck.
FullBurn™Plugs into OBD-II
TuneHandheld tuner
Mechanical deleteParts + labour
What you'll notice in the first 10 miles
Owners report the same three things gone.
A quiet, smooth cruise
No more boom through the cab at light throttle. The engine sounds like a V8 the whole drive.
Instant, even response
All eight are already firing, so there's no jolt when you press the pedal.
A transmission that stays put
No more searching for a gear when you ask for power. It just goes.
Frequently Asked Questions
No, and no. A tune rewrites your ECU calibration and leaves a permanent record of the flash. FullBurn does not reprogram anything, does not flash anything, and does not remove or replace a single mechanical part.
It sits on the OBD-II port and holds the engine in full-cylinder mode so the deactivation command is never issued. Pull it out and your truck is exactly as it left the factory.
Two ways. First, the LEDs: red POWER confirms it's live, green FUNCTION confirms it's holding full-cylinder mode.
Second - and this is the one owners notice the way the truck drives. Within the first ten miles most people report the same three things gone: no drone or pulsation at light cruise, no lurch when the engine comes back to eight cylinders, and no hunting or hesitation from the transmission when they ask for power.
Under the Magnuson-Moss Warranty Act, a dealer cannot void your warranty simply because an aftermarket part is installed - the burden is on them to show the part caused the failure.
In practice the bigger point is that FullBurn leaves nothing behind: it isn't a tune, it doesn't flash your ECU, and it writes nothing permanent.
Unplug it before a service visit and there is no trace it was ever there. That's not true of a handheld tuner, which leaves a flash counter the dealer can read.
Check before you order — this is the #1 complaint in the whole category and it's an avoidable one.
FullBurn fits select Chevrolet, GMC, Cadillac and Buick models, 2004–2024. It is not compatible with 10-speed transmissions, and 2022+ refresh models use a different ECM.
Confirm your year, engine and transmission on the fitment chart before checkout. If you're unsure, send us the year, model and engine and we'll tell you - including if the answer is no.
Standby draw is low, but it is not zero - nothing on a live OBD-II port is. For daily driving, leave it in.
If the vehicle is going to sit for more than a few days - storage, a trip, a seasonal truck - unplug it, the same as you would any OBD-II accessory.
It might. Real-world reports run from about +1 to −3 mpg depending on how you drive; we won't claim you'll gain any. Worth the context: when GM themselves built trucks without cylinder deactivation in 2021–2022 because of the chip shortage, the window-sticker penalty they published was 1 mpg.
One owner ran the math over 290,000 miles and figured the system had saved him roughly $490 in fuel. He'd already spent five figures on the engine.
Both work, and both cost you more than money. A tune runs $300–$650, is a permanent flash, and is visible to the dealer.
A mechanical delete is $873–$1,200 in parts and $2,500–$4,000+ installed — heads off, new camshaft, still needs a tune, truck down for days, and there is no going back. Inline modules run $599–$650 and have a documented habit of upsetting unrelated electronics.
FullBurn is the version you can undo: nothing flashed, nothing removed, nothing permanent.
Yes — they're different systems and both are covered. AFM (2005–2018, roughly) shuts down four fixed cylinders — 1, 4, 6 and 7 — and brings them back.
DFM (2019+) is more aggressive: the ECU re-decides the firing pattern up to 80 times a second across 17 patterns, with every cylinder independently switchable.
Either way it's the same mechanism doing the switching, and FullBurn holds both in full-cylinder mode.
Yes. Unplug it before the test and drive normally for a couple of hundred miles so the readiness monitors reset, then plug it back in afterward.
It takes five seconds each way. We'd rather tell you that now than have you find out at the testing station.
Our shipping typically takes 3-5 business days in the USA and 7-10 business days in other parts of the world.
If you are not completely satisfied, we are here to make it right.
We stand behind our products with a 30-day money-back guarantee.
Plus, our customer support team is always ready to assist with any questions or concerns.
