✅ 90-DAY MONEY BACK GUARANTEE
✅ 12-MONTH WARRANTY
✅ REPLY WITHIN 24H
✅ FREE SHIPPING
✅ 90-DAY MONEY BACK GUARANTEE
✅ 12-MONTH WARRANTY
✅ REPLY WITHIN 24H
✅ FREE SHIPPING
✅ 90-DAY MONEY BACK GUARANTEE
✅ 12-MONTH WARRANTY
✅ REPLY WITHIN 24H
✅ FREE SHIPPING
✅ 90-DAY MONEY BACK GUARANTEE
✅ 12-MONTH WARRANTY
✅ REPLY WITHIN 24H
✅ FREE SHIPPING
✅ 90-DAY MONEY BACK GUARANTEE
✅ 12-MONTH WARRANTY
✅ REPLY WITHIN 24H
✅ FREE SHIPPING
✅ 90-DAY MONEY BACK GUARANTEE
✅ 12-MONTH WARRANTY
✅ REPLY WITHIN 24H
✅ FREE SHIPPING
✅ 90-DAY MONEY BACK GUARANTEE
✅ 12-MONTH WARRANTY
✅ REPLY WITHIN 24H
✅ FREE SHIPPING
✅ 90-DAY MONEY BACK GUARANTEE
✅ 12-MONTH WARRANTY
✅ REPLY WITHIN 24H
✅ FREE SHIPPING
✅ 90-DAY MONEY BACK GUARANTEE
✅ 12-MONTH WARRANTY
✅ REPLY WITHIN 24H
✅ FREE SHIPPING
✅ 90-DAY MONEY BACK GUARANTEE
✅ 12-MONTH WARRANTY
✅ REPLY WITHIN 24H
✅ FREE SHIPPING
EirCore™ AFM/DFM Disabler — Full-Time V8
EirCore™ AFM/DFM Disabler — Full-Time V8
Prevents $3,000+ lifter failure
- ⚠️The repair is on you, not GM.
- 📄GM has a bulletin on it. No recall.
- ✅30 seconds. No tools. Reversible.
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EirCore™ AFM/DFM Disabler — Full-Time V8
🛡️ Will this void my factory warranty?
🛡️ Will this void my factory warranty?
No. EirCore™ doesn’t reprogram anything. It doesn’t flash your ECU, it doesn’t write code, and it doesn’t leave a tune behind. It reads the data bus and sends a command — that’s it.
Unplug it before any dealer visit and your truck reads 100% stock in about three seconds. Nothing to reverse, nothing to explain.
Worth knowing: under the federal Magnuson-Moss Warranty Act, a manufacturer can’t void your warranty just because you installed an aftermarket part. They’d have to prove the part caused the failure. A device that leaves no trace makes that argument hard to make.
🔌 Will it throw a check engine light or store codes?
🔌 Will it throw a check engine light or store codes?
No check engine light. No stored codes. No readiness monitor issues.
EirCore™ doesn’t modify your ECU, so there’s nothing for it to flag. Your emissions monitors keep completing normally and your truck passes inspection the same way it did yesterday.
One thing worth doing right: leave it plugged in. Repeatedly yanking it out and pushing it back in mid-drive is the one thing that can confuse the module. Plug it in once and forget about it.
📟 How do I know it’s actually working?
📟 How do I know it’s actually working?
Watch your DIC — the info display in your instrument cluster. Before EirCore™, you’ll see it flip to V4 (or “4 cylinder mode”) when you’re cruising steady or coasting downhill. After EirCore™, it stays on V8. All the time.
You’ll feel it too: no more soft shudder when the cylinders drop out, no more hesitation when you get back on the throttle. Most owners notice it in the first ten minutes.
If your DIC still shows V4 after installation, don’t guess — email us at support@eircore.com with your year, model, and a photo of the display. We’ll sort it out or send you a refund.
🔋 Will it drain my battery?
🔋 Will it drain my battery?
Not in normal use. EirCore™ drops into sleep mode a few minutes after you shut the truck off and draws under 2 mA — less than your key fob sitting in your pocket.
The honest caveat: if you park the truck for more than about three weeks without driving it — seasonal storage, a long trip, a work truck that sits — unplug it. That’s true of any OBD-II device, ours included. Takes three seconds.
⛽ Will I lose fuel economy?
⛽ Will I lose fuel economy?
Yes. AFM exists to save fuel, so switching it off costs you some. Expect around 1–2 MPG in city driving. On the highway most owners see little to no change, because the system barely engages at steady cruise anyway.
At 12,000 miles a year and $3.30 a gallon, 1 MPG works out to roughly $180 a year. A lifter and camshaft job runs $3,000 to $8,000, and it’s not covered once you’re out of warranty.
🔧 My lifter is already ticking. Will this fix it?
🔧 My lifter is already ticking. Will this fix it?
No. And we’d rather lose the sale than let you find that out after it ships.
If you’re already hearing a tick, a lifter has already collapsed or is on its way. Nothing you plug into the OBD-II port reverses metal damage. At that point you’re looking at a shop, not a module.
What EirCore™ does is stop the cycling that causes it in the first place. It’s prevention. If your truck is running clean right now and you want to keep it that way, this is exactly the right time to install one — and if you’re about to have the lifters replaced, install one right after, so the new ones don’t go the same way.
⚖️ Is it legal where I live?
⚖️ Is it legal where I live?
In 49 states, yes. EirCore™ doesn’t touch your emissions equipment, doesn’t disable any monitor, and doesn’t alter your ECU — it operates within the EPA Tampering Policy issued November 23, 2020.
California is the exception. Cylinder deactivation control devices are not approved by CARB, so we don’t sell or ship to California addresses. Every manufacturer of cylinder-deactivation control devices carries the same CARB restriction. If your billing address is in California, our checkout will let you know.
Everywhere else, your truck passes inspection the same as it always has. That’s the trade — we’d rather you make it with the real numbers in front of you.
Every Time AFM Kicks In, Your Lifters Pay the Price
Built for GM owners who won’t gamble with a $3,000–$8,000 repair bill — or a laggy, shuddering drive.
Install in 3 Easy Steps
No mechanic. No tools. No permanent changes.
🔵 Blue lights on = AFM off — full V8 protection active
EirCore™ vs. a Tune vs. a Delete Kit
Three ways to shut AFM off. Only one takes 30 seconds and undoes itself.
| Feature | EirCore™ Disabler | AFM-Disable Tune | Delete Kit |
|---|---|---|---|
| Install time | 30 seconds, plug-and-play | Shop visit + ECU flash | Hours in a shop |
| Tools required | None | Tuner & laptop | Full tool set & lift |
| ECU reprogramming | None | Permanent flash | Permanent tune |
| Reversible | Yes — unplug anytime | No — must be re-flashed | No |
| Dealer-safe | Reads 100% stock | Flash count changes in the ECM | Leaves a trace |
| Engine disassembly | None | None | Required |
| Warranty on the part | 12 months, free replacement | Not stated | Not stated |
| Typical cost | $99 | $400–$800 | $1,500–$3,000+ |
⚠️ Not every plug-in is built the same. Low-cost copies of this module are sold under many names. Every EirCore™ unit is tested before it ships and backed by a 12-month replacement warranty, a 90-day money-back guarantee, and a US support line — if a cheaper module can’t show you those three things, that’s the price you’re really paying.
One Module, Full Protection.
The switch that every GM truck driver needs.
Plug-In & Drive
Installs in seconds. No tools, no apps, no programming — just plug into the OBD2 port and go.
GM Compatible
Fits Silverado, Sierra, Tahoe, Yukon, Suburban, Escalade & 80+ GM V6/V8 models (2004–2022).
Full Cylinder Power
Locks engine in full V8 mode. Restores instant throttle response — no more shudder, no more lifter stress.
✓Check your fitment80+ GM models verified · takes 5 seconds▾
CHECK YOUR FITMENT
✓ 80+ MODELS VERIFIEDConfirm your GM runs AFM/DFM — takes 5 seconds.
Browse all 80+ compatible GM models▾
Full Compatibility List — 80+ GM Models
The complete list of verified GM vehicles — V6, V8 and select 4-cyl engines, 1.4L–6.2L, 2004–2022. Prefer a 5-second check? Use the fitment tool near the top.
Chevrolet 29 fitments ▾
- Avalanche — 5.3L V8 (2007-2013)
- Camaro — 3.6L V6 (2012-2015)
- Camaro — 6.2L V8 (2012-2015)
- Colorado — 3.6L V6 (2015-2022)
- Corvette — 6.2L V8 (2014-2019)
- Equinox — 3.6L V6 (2010-2017)
- Express Van — 6.0L V8 (2010-2021)
- Impala — 3.6L V6 (2014-2020)
- Malibu — 3.6L V6 (2013-2015)
- Silverado 1500 — 4.3L V6 (2014-2018)
- Silverado 1500 — 5.3L V8 (2007-2022)
- Silverado 1500 — 6.0L V8 (2007-2013)
- Silverado 1500 — 6.2L V8 (2014-2022)
- Silverado 2500HD — 6.0L V8 (2007-2019)
- Silverado 3500HD — 6.0L V8 (2007-2019)
- Suburban — 5.3L V8 (2007-2020)
- Suburban — 6.2L V8 (2015-2020)
- Tahoe — 5.3L V8 (2007-2020)
- Tahoe — 6.2L V8 (2015-2020)
- Traverse — 3.6L V6 (2009-2017)
- TrailBlazer — 4.2L I6 (2006-2009)
- TrailBlazer — 5.3L V8 (2006-2009)
- TrailBlazer — 6.0L V8 (2006-2009)
- Uplander — 3.9L V6 (2006-2008)
- Venture — 3.4L V6 (2005)
- Volt — 1.4L I4 (2016-2019)
- SSR — 6.0L V8 (2005-2006)
- HHR — 2.4L I4 (2008-2011)
- Cobalt — 2.4L I4 (2008-2010)
GMC 13 fitments ▾
- 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 — 5.3L V8 (2015-2020)
- Yukon XL — 6.2L V8 (2014-2020)
- Terrain — 3.6L V6 (2010-2017)
Cadillac 11 fitments ▾
- ATS — 3.6L V6 (2013-2019)
- CT6 — 3.0L V6 (2016-2018)
- CT6 — 3.6L V6 (2016-2018)
- CTS — 3.6L V6 (2004-2019)
- CTS — 6.0L V8 (2006-2007)
- CTS — 6.2L V8 (2009-2019)
- Escalade / ESV — 6.0L/6.2L V8 (2010-2020)
- SRX — 3.6L V6 (2004-2009)
- STS — 3.6L V6 (2005-2007)
- XT5 — 3.6L V6 (2017-2019)
- XTS — 3.6L V6 (2013-2019)
Buick 7 fitments ▾
- Enclave — 3.6L V6 (2008-2020)
- Envision — 2.5L I4 (2017-2018)
- LaCrosse — 3.6L V6 (2005-2019)
- LaCrosse — 5.3L V8 (2008-2009)
- Rainier — 5.3L V8 (2005-2007)
- Rendezvous — 3.6L V6 (2006-2007)
- Terraza — 3.9L V6 (2006-2007)
Pontiac 9 fitments ▾
- 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)
Holden (AU) 10 fitments ▾
- Calais / SV6 — 3.6L V6 (2006-2018)
- Commodore Wagon — 3.6L V6 (2006-2018)
- Commodore Sedan — 3.6L V6 (2006-2018)
- Crewman / Ute — 3.6L V6 (2006-2018)
- 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)
Saturn 4 fitments ▾
- Aura — 3.6L V6 (2007-2009)
- Outlook — 3.6L V6 (2007-2008)
- Relay — 3.9L V6 (2006-2008)
- VUE — 3.6L V6 (2008-2009)
Saab 1 fitment ▾
- 9-7X — 5.3L V8 (2005-2009)
Isuzu 1 fitment ▾
- Ascender — 5.3L V8 (2005-2009)
Suzuki 1 fitment ▾
- XL7 — 3.6L V6 (2007-2009)
Not sure if your vehicle is compatible?
Contact us with your year & model — we'll confirm fitment within 24 hours.
What Buyers Say
Real photos from verified GM truck owners
"Still locked in V8 at 175K miles. Best money I have spent on this truck."
"Shudder gone on my Silverado the first drive. Plug in, green light, done."
"Found the port, clicked it in, blue lights came on. That was the whole install."
"My 5.3 finally stays on all 8 cylinders. No more lifter worries."
"Two-minute job — tucks right up under the dash out of the way."
"Exactly as described, feels solid. Same one my buddy runs on his Chevy."
"Showed up fast and packed well with a guide. Setup could not be simpler."
"Runs perfect in my Silverado — no codes, no problems."
"No more dropping to 4 cylinders. Truck just feels stronger."
"Noticed smoother throttle right away. Highly recommend."
"Quality unit that does exactly what it says. Fast shipping too."
Photos submitted by verified buyers of this AFM/DFM module. Individual results vary.
Ready to Protect Your V8?
Keep your engine running at full power — every drive, every mile.
$99 now — or $3,000–$8,000 later. Your call.