Vizzorn AFM/DFM Disabler

Vizzorn AFM/DFM Disabler

 (8,042 Reviews)
$64.99
$64.99
SAVE Sold out

Keeps Your V8 A V8. Always

Plug In. Protect Your Engine. Done

Stop the Tick Before It Costs Thousands

Doesn't Void Warranty

  • Plugged it in day one, 180k miles later, not a single tick.

    Jake R.

  • Wish I found this before my $6,200 lifter bill — don't make my mistake

    Emilee J.

  • Truck shifts smoother, no more shudder, took 30 seconds to install.

    Jordan R.

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    Vizzorn AFM/DFM Disabler

    Vizzorn AFM/DFM Disabler

    $64.99
    $64.99
    SAVE Sold out
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    How WE solve YOUR problem!

    GM built a fuel-saving system called AFM/DFM into millions of Silverados, Sierras, Tahoes, and Escalades. The problem is the special lifters it uses are mechanically weak — and every time your engine switches between V8 and V4 mode, those lifters are one cycle closer to collapsing. When one fails, it takes the camshaft with it. That's a $5,000–$8,000 repair bill, usually right after your warranty expires. Our disabler plugs into your OBD-II port in under 60 seconds and tells your engine's computer to stay in full V8 mode — permanently. No more switching. No more stress on those lifters. No tuning, no ECU reprogramming, no mechanic needed. Just plug it in and drive.

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    Why you'll Love it

    Because you bought a V8 to drive a V8. The moment you plug this in, the shudder disappears, the hesitation when you hit the gas is gone, and your truck finally feels the way it should have felt off the lot. No more wondering if that faint tick you heard this morning is the beginning of a $6,000 nightmare. You'll love that it took 30 seconds to install. You'll love that it leaves zero footprint — unplug it and your truck goes back to factory settings instantly. But most of all, you'll love the peace of mind of knowing you did something about it before it was too late.

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    Shipping Information

    Your order ships within 24 hours and arrives in 7 days or less — straight to your door. Every package is tracked from the moment it leaves our warehouse so you always know exactly where it is. The sooner you order, the sooner your engine is protected.

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    FITS THE TRUCK YOU ALREADY OWN

    Compatible with Chevrolet, GMC, Cadillac and more — covering V6 and V8 engines from 4.3L all the way to 6.2L. Check the compatibility chart in the image below to confirm your exact year, make, and model before ordering.

    Frequently Asked Questions

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    Will this void my truck's warranty??

    No — this device never reprograms or modifies your ECU in any way. Simply unplug it and your truck returns to 100% factory settings with zero trace, making it completely undetectable.

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    Does this device need to stay plugged in at all times?

    Yes — the disabler must remain plugged into your OBD-II port 24/7 to keep AFM/DFM disabled. The moment you unplug it, your engine goes back to factory cylinder deactivation mode.

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    How do I know if my truck is compatible?

    Check the compatibility chart included in our product images — we cover most GM V6 and V8 engines from 2007 to 2021 including the 4.3L, 5.3L, 6.0L, and 6.2L across Silverado, Sierra, Tahoe, Yukon, and Escalade.

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    Will it drain my battery?

    No — our device runs on an extremely low power draw that will not affect your battery under normal driving conditions.

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    My truck runs fine right now — do I still need this?

    That's exactly when you need it most. AFM lifter failure happens silently with zero warning — by the time you hear the tick or see a check engine light, the damage is already done.

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    How long does installation take?

    Under 60 seconds. Find the OBD-II port under your dashboard, plug the device in, and it starts working immediately — no tools, no mechanic, no technical knowledge required.

    BUILT TO PROTECT THE TRUCK YOU WORKED FOR

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    Keeps Your V8 Running Like A V8

    GM's AFM/DFM system drops your engine to 4 cylinders hundreds of times every drive. This device stops that completely — full power, all 8 cylinders, every single time you turn the key.

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    Installs In Under 60 Seconds

    No mechanic, no tools, no technical knowledge required. Just find your OBD-II port under the dash, plug it in, and you're done — it starts working immediately.

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    Zero Risk To Your Truck

    This device never reprograms or modifies your ECU in any way. Unplug it anytime and your truck returns to 100% factory settings — no trace, no codes, no warranty concerns.

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    Cheap Insurance Against A Massive Repair Bill

    The average AFM lifter failure costs between $5,000 and $8,000 — and it usually hits right after your warranty expires. One small plug-in device today is all it takes to protect the engine you depend on.

    WHAT GM TRUCK OWNERS ARE SAYING

    • Best $65 I've Ever Spent On This Truck

      I put 180,000 miles on my last Silverado before the lifters went and cost me $5,800 out of pocket. When I picked up my 2015 I wasn't going to make that mistake again. Plugged this in on day one and haven't had a single issue since. Best $65 I've ever spent on this truck

      Jakw R.

    • Wish I Had Just Done It From The Start

      I ignored the forums for two years telling myself I'd be one of the lucky ones. I wasn't — lifter failure at 74,000 miles, right outside my warranty, and GM wouldn't touch it. Got this disabler installed on my replacement engine the same day I got the truck back. Wish I had just done it from the start and saved myself $6,500

      Emily H.

    • I Finally Stopped Waiting For That Tick To Show Up

      My buddy's identical Tahoe threw a lifter last spring and he was without his truck for three weeks waiting on parts. That was all I needed to hear. Ordered this the same night, had it plugged in before I even finished my morning coffee. Truck shifts smoother, no shudder at highway speeds, and I finally stopped waiting for that tick to show up.

      Danny L.