OBD2 Plug-In AFM/DFM Disable Module
ProDrive™ AFM/DFM Disable Module
- 10-second plug & play — no tools needed
- Helps reduce AFM/DFM activation & engine shudder
- Zero ECU modifications — fully reversible
- Full V8 power locked 24/7
Couldn't load pickup availability
90-day money-back guarantee
What Owners Are Telling Us.
Straight from the reviews — no filter.
"My '15 Silverado 5.3 had a shudder for two years straight. Plugged this in and it stopped right away — wish I'd skipped the $200 mechanic visit that told me my lifters were on their way out."
"Figured it was just another OBD gadget until my buddy, who's an actual Chevy tech, told me it's what he runs on his own trucks. Three months in — no codes, no issues, V8 mode the whole time."
"Bought a used Sierra with 97k on it and every forum said disable the AFM immediately. Ten seconds to plug in, and now I'm not lying awake worrying about the lifters."
"Zero codes in three months, no drain on the battery, and the truck finally drives the way it should have from day one. Grabbed a second unit for my dad's Tahoe already."
"I tow a 24-foot boat most weekends and the V4 drop under load about drove me crazy. Plugged this in and now it's full V8 on every grade. Should've grabbed one years back."
"Shop quoted me for a lifter job. Ordered this the same day and plugged it in — cheapest insurance policy I've bought for this truck."
Is Your Vehicle Compatible?
The 2025 update covers 80+ GM models across Chevrolet, GMC, Cadillac, Buick, Pontiac, Holden, and a few other badges.
| MODEL | ENGINE | YEARS |
|---|---|---|
| Avalanche | 5.3L V8 | 2007–2013 |
| Avalanche | 6.0L V8 | 2007–2009 |
| Camaro | 3.6L V6 | 2016–2024 |
| Camaro | 6.2L V8 | 2010–2024 |
| Caprice PPV | 6.0L V8 | 2011–2017 |
| Colorado | 3.6L V6 | 2015–2020 |
| Corvette | 6.2L V8 | 2012–2019 |
| Equinox Sport | 3.6L V6 | 2008–2009 |
| Express 1500 | 5.3L V8 | 2014 |
| Impala | 3.9L V6 | 2007–2009 |
| Impala | 5.3L V8 | 2006–2009 |
| Malibu | 3.6L V6 | 2008–2012 |
| Malibu | 3.9L V6 | 2006–2007 |
| Monte Carlo | 5.3L V8 | 2006–2007 |
| Silverado 1500 | 4.3L V6 | 2007–2021 |
| Silverado 1500 | 5.3L V8 | 2007–2022 |
| Silverado 1500 | 6.0L V8 | 2007–2013 |
| Silverado 1500 | 6.2L V8 | 2009–2022 |
| Silverado 1500 LD | 5.3L V8 | 2019 |
| SS | 6.2L V8 | 2014–2017 |
| Suburban | 5.3L V8 | 2014–2020 |
| Suburban | 6.0L V8 | 2016–2018 |
| Suburban | 6.2L V8 | 2019–2020 |
| Suburban 1500 | 5.3L V8 | 2007–2014 |
| Suburban 1500 | 6.0L V8 | 2007–2013 |
| Suburban 2500 | 6.0L V8 | 2007–2013 |
| Tahoe | 5.3L V8 | 2007–2020 |
| Tahoe | 6.2L V8 | 2018–2020 |
| Trailblazer | 5.3L V8 | 2006–2008 |
| Uplander | 3.9L V6 | 2006–2009 |
| MODEL | ENGINE | YEARS |
|---|---|---|
| Acadia | 3.6L V6 | 2007–2008 |
| Canyon | 3.6L V6 | 2015–2020 |
| Envoy | 5.3L V8 | 2005–2009 |
| Sierra 1500 | 4.3L V6 | 2007–2018 |
| Sierra 1500 | 5.3L V8 | 2007–2022 |
| Sierra 1500 | 6.0L V8 | 2007–2013 |
| Sierra 1500 | 6.2L V8 | 2007–2022 |
| Sierra / Denali | 6.2L V8 | 2009–2018 |
| Yukon | 5.3L V8 | 2007–2020 |
| Yukon | 6.2L V8 | 2010–2020 |
| Yukon XL 1500 | 6.2L V8 | 2014 |
| Yukon XL | 5.3L V8 | 2015–2020 |
| MODEL | ENGINE | YEARS |
|---|---|---|
| ATS | 3.6L V6 | 2013–2019 |
| CT6 | 3.6L V6 | 2016–2018 |
| CT6 (non Hybrid) | 3.0L V6 | 2016–2018 |
| CTS | 3.6L V6 | 2004–2019 |
| CTS | 6.0L V8 | 2006–2007 |
| CTS | 6.2L V8 | 2009–2019 |
| Escalade / ESV | 6.0/6.2L V8 | 2010–2020 |
| Escalade ESV | 6.2L V8 | 2010–2013 |
| SRX | 3.6L V6 | 2004–2009 |
| STS | 3.6L V6 | 2005–2007 |
| XT5 | 3.6L V6 | 2017–2019 |
| XTS | 3.6L V6 | 2013–2019 |
| MODEL | ENGINE | YEARS |
|---|---|---|
| Enclave | 3.6L V6 | 2008–2020 |
| Envision | 2.5L L4 | 2017–2018 |
| LaCrosse | 3.6L V6 | 2005–2019 |
| LaCrosse | 5.3L V8 | 2008–2009 |
| Rainier | 5.3L V8 | 2005–2007 |
| Rendezvous | 3.5/3.6L V6 | 2006–2007 |
| Terraza | 3.9L V6 | 2006–2007 |
| MODEL | ENGINE | YEARS |
|---|---|---|
| G6 | 3.6L V6 | 2008–2009 |
| G6 | 3.9L V6 | 2007 |
| G8 | 3.6L V6 | 2008–2009 |
| G8 | 6.0L V8 | 2008–2009 |
| G8 | 6.2L V8 | 2009 |
| Grand Prix | 3.8L V6 | 2007 |
| Grand Prix | 5.3L V8 | 2005–2008 |
| Montana | 3.9L V6 | 2006–2009 |
| Torrent | 3.6L V6 | 2008–2009 |
| MODEL | ENGINE | YEARS |
|---|---|---|
| VZ Calais SV6 | 3.6L V6 | 2006–2018 |
| Commodore Wagon | 3.6L V6 | 2006–2018 |
| VZ Commodore Sedan | 3.6L V6 | 2006–2018 |
| Crewman / UTE | 3.6L V6 | 2006–2018 |
| 9C1 Police Special | 6.0L V8 | 2015–2018 |
| Rodeo | 3.6L V6 | 2006–2011 |
| Colorado | 3.6L V6 | 2006–2009 |
| VE Commodore Omega | 3.6L V6 | 2006–2009 |
| WL Statesman | 3.6L V6 | 2006–2017 |
| WM Statesman / Caprice | 3.6L V6 | 2006–2017 |
| MODEL | ENGINE | YEARS |
|---|---|---|
| Saab Outlook XE | 3.6L V6 | 2007–2008 |
| Saab Relay | 3.9L V6 | 2006–2008 |
| Saab 9-7X | 5.3L V8 | 2005–2009 |
| Saturn Aura XR | 3.6L V6 | 2007–2009 |
| Saturn VUE XR / Red Line | 3.9L V6 | 2008–2009 |
| Isuzu Aura XR | 3.6L V6 | 2007–2009 |
| Isuzu Ascender | 5.3L V8 | 2005–2009 |
| Suzuki XL2 | 3.6L V6 | 2007–2009 |
Don't see your exact year or trim?
Send us your vehicle details and we'll check for free.
Every Drive Is Wearing Your Engine Down
GM's Active Fuel Management keeps switching your engine between V8 and V4 mode as you drive. Each switch adds stress to the lifters — and eventually, something gives.
Worn Lifters
Repeated cycling between V8 and V4 mode grinds down the lifters over time. It's a well-known weak point on LT engines — the question isn't if, it's when.
That Shudder
That rough shake when your truck drops to four cylinders isn't just annoying — it's a sign the engine is under real stress every time it happens.
A $5,000+ Bill
Once lifters go, you're facing a full teardown or an engine swap. Owners end up paying thousands, or scrapping the engine for a few hundred bucks at the yard.
A small price next to a $5,000+ repair bill
No Tools. No Mechanic. 10 Seconds.
Plug it in, watch the light, drive. That's the whole process.
Locate the OBD-II Port
Under the dash on the driver's side — a standard 16-pin connector found on every GM truck and SUV.
Plug In CylinderGuard
Line it up and push it into place. No wiring, no programming, no special know-how required.
⚡ ~10 secondsGreen Light, Full V8
A steady green LED means it's working. Your engine stays in full-cylinder mode — no drop, no shudder.
Drive and Forget It
Leave it plugged in and go about your day. Pull it any time to go back to factory behavior instantly.
CylinderGuard vs. Mechanical Delete Kits
Same outcome, without the cost or the downtime.
| CylinderGuard | Delete Kits | |
|---|---|---|
| Install | Plugs into the OBD-II port in ~10 seconds | Needs a shop and a real install job |
| Engine work | Nothing to take apart under the hood | Means pulling the engine apart |
| Reversibility | Unplug anytime — no trace left behind | Permanent unless you pay for more labor |
| ECU | Never touched | Reprogramming can affect your warranty |
| Cost | ~$89.95 | $1,500–$3,000+ |
Why 3,000+ Owners Rely on CylinderGuard
An easy way to keep AFM/DFM cycling from wearing on your GM V6 or V8.
Full V8, All the Time
Keeps your engine in full-cylinder mode around the clock. No surprise V4 drops on hills, highways, or at idle.
Less Cycling, Less Wear
Cuts down on the cylinder cycling tied to premature lifter wear on LT engines. Real, meaningful protection.
Your ECU Stays Untouched
Factory programming is never altered. Unplug it whenever you want and you're back to stock instantly.
Smoother, Fuller-Sounding
No more shudder or rough vibration from cylinder deactivation — just consistent power and a fuller note.
Broad, Up-to-Date Fitment
Covers Silverado, Sierra, Tahoe, Yukon, Suburban, Escalade, Camaro, Corvette, and dozens of other GM V6/V8 models from 2004–2022.
More From Owners on the Road
A few more notes from the 3,000+ GM owners running CylinderGuard.
"Two years of shudder on my '15 Silverado 5.3, gone the moment I plugged this in. Should have bought it before paying a mechanic $200 to tell me the lifters were going. Best 89 bucks I've spent on this truck."
"Figured it was too cheap to actually do anything compared to a full delete, but it works as described. Light came on, and the truck stopped dropping to V4 on the downhill stretch it always used to. My buddy ordered one that same night."
"Bought a Sierra with 97k miles on it, and every thread I read said get the AFM disabled before the lifters fail. Ten seconds to install and now I'm not sweating a $4,000 repair."
"Smoother ride, better sound, and that annoying V4 drop while cruising is gone. Three months plugged in with zero problems — already picked up a second one for my dad's Tahoe."
Questions Owners Ask
Answers before you buy.
Does it touch my ECU or damage anything?
Do I need a mechanic or any tools to install it?
What is it actually doing to my engine?
Will it work on my specific vehicle?
Does it need to stay plugged in?
What happens if it's not what I expected?
Get Ahead of AFM Damage
$89.95 now, or a much bigger bill later. Backed by a 75-day money-back guarantee, free shipping, and 3,000+ units sold.