That was my experience with my 2015 Chevy Silverado 5.3L V8—until I installed the . It’s a simple plug-and-play module that disables AFM/DFM cleanly, without throwing codes or requiring any tuning. And the difference? Immediate and impressive.
🔧 Plug-and-Play Simplicity
Installation took less than a minute. I plugged the device into the OBD-II port under the dash, started the truck, and that was it. No tools, no reprogramming, no hassle. The truck now runs in full V8 mode all the time—just as it should.
🚀 Performance That Speaks for Itself
Throttle Response: Smoother and more predictable. No more lag or hesitation.
Transmission Shifting: Gone are the awkward gear changes caused by cylinder deactivation. Shifts are clean and confident.
Driving Feel: The truck feels stronger, more responsive, and more consistent—especially under load or during acceleration.
✅ No Drop in MPG
One of the biggest surprises? My fuel economy didn’t suffer. Despite running all eight cylinders full-time, I haven’t seen any noticeable drop in mileage. In fact, the consistent engine behavior might be helping overall efficiency.
🛠️ Why This Device Matters
AFM/DFM systems were designed to improve fuel economy by deactivating cylinders during light-load conditions. But in practice, they often lead to:
Lifter failure and increased oil consumption
Inconsistent power delivery
Reduced towing and hauling performance
This disabler solves all of that—without touching your ECU or voiding your warranty, according to the manufacturer.
🚙 Compatible GM Vehicles
This device works with a wide range of GM models and engines (make sure it will work on YOUR vehicle):
Chevy Silverado, Tahoe, Suburban
GMC Sierra, Yukon
Cadillac Escalade
Buick Enclave, LaCrosse
Chevy Camaro, Impala
And more…
Supported engines: 3.6L, 4.3L, 5.3L, 6.0L, 6.2L
🛒 Final Verdict
If you’re tired of your V8 acting like a V4, this device is a must-have. It’s a small investment that delivers big returns in drivability, reliability, and satisfaction. My Silverado finally feels like the truck it was meant to be.
You can grab the AFM/DFM Disabler on —and trust me, your engine will thank you.
Disclaimer: I’m not receiving any money, compensation, or perks for this review. I have no stake in the product or the manufacturer—just a truck, this device, and a genuine appreciation for how well it works.
Manufacturer Note (Brand: LYMAYDA): The product claims to disable AFM/DFM without touching your ECU or voiding your warranty.
Important: Actual results may vary depending on your vehicle’s configuration, condition, and driving habits. Always consult your mechanic or dealership if you have concerns about compatibility or warranty impact.