FullForce ™ AFM/DFM Disabler Customer Reviews

If you’re considering purchasing our FullForce™ AFM/DFM Disabler, we encourage you to take a moment to listen to what our customers have to say.

We greatly value your feedback and would love to hear your own stories and experiences after using our FullForce™ AFM/DFM Disabler.

Customer reviews

4.95
Based on 169 reviews
5
95%
161
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With images (0) Verified (169)
All stars (169)
Sammantha Sasenick
I drive a 2015 Yukon XL for work and was tired of the cylinder drop feeling every time I merged onto the freeway. FullForce locks full V8 mode 24/7, and the acceleration is consistent now. No more hesitation or shudder under load.
Helpful? 0 0
James H
After hearing horror stories about GM lifter failures, I ordered FullForce as a preventative measure for my 2017 Suburban. Six months in, the engine runs smoother, and I haven’t had any of the rough idle or misfire codes I used to see.
Helpful? 0 0
Vanessa Sheri
The best part is how reversible it is. I tested it on my 2014 Camaro SS for a week, then unplugged it to see if anything changed. The car went right back to stock behavior with no trace. Plugged it back in the next day and kept it there.
Helpful? 0 0
Kristie VanHoorn
My 2016 Tahoe was due for a lifter replacement at 110k miles. After installing FullForce, I’ve driven another 15k miles with zero issues and no more rough idle. The green LED gives me peace of mind every time I start the truck.
Helpful? 0 0
Nikiya Ellis
Plug‑and‑play really means plug‑and‑play. I found the OBD port under the dash, plugged it in, waited for the green light, and drove off. No tools, no coding, no dealership visit. My 2019 Sierra 6.2L feels like a brand‑new V8 again.
Helpful? 0 0
Emily Jane Morgan
I was worried about voiding my warranty, but FullForce doesn’t touch the ECU at all. It just blocks the deactivation commands. My 2020 Silverado still passes emissions, and the dealer can’t tell anything was ever plugged in.
Helpful? 0 0
James He
The shudder on my 2016 Escalade was so bad I thought the transmission was failing. Turns out it was AFM cycling. FullForce fixed it instantly. Now the ride is buttery smooth, and the exhaust note sounds fuller without the cylinder cuts.
Helpful? 0 0
Sharon Lantz
My 2018 Colorado Z71 used to feel sluggish on steep mountain roads because the ECU kept dropping cylinders. With FullForce installed, the truck holds full power all the way up, and the transmission shifts feel much more confident.
Helpful? 0 0
Dion Sekone-Fraser
I’ve tried other AFM disablers before, but they either didn’t work on my 2019 GMC Sierra or caused weird warning lights. FullForce worked on the first try, no check engine light, and the green LED confirms it’s active every time I start the truck.
Helpful? 0 0
Sharon Nowak
As a daily driver, my 2015 Silverado 5.3L was racking up miles fast. I didn’t want to risk a $3,000 lifter job, so I got FullForce. After 20k miles with it installed, the engine still runs like new, and I haven’t had any lifter tick or misfires.
Helpful? 0 0
RB
The installation took literally 10 seconds. I parked, found the OBD port, plugged it in, and the green light came on. My 2017 Tahoe now feels like it should have from the factory—strong, smooth, and always in V8 mode.
Helpful? 0 0
Larisa Le
I tow a boat with my 2018 Yukon, and AFM used to kick in right when I needed power most. FullForce keeps all cylinders firing, so towing feels safer and more predictable. No more sudden power drops when climbing boat ramps.
Helpful? 0 0
Janette
My mechanic recommended an AFM disabler after seeing lifter wear on my 2014 Silverado. I chose FullForce because of the compatibility list and reviews. Three months later, the truck runs smoother, and I’m confident I avoided a major repair.
Helpful? 0 0
Kari S.
The difference in driving feel is night and day. My 2016 Sierra 5.3L used to lurch when cylinders deactivated. Now it’s linear and smooth from idle to highway speeds. I wish GM offered a factory option to disable AFM like this.
Helpful? 0 0
Tommye
The green LED is a nice touch. Every time I start my 2017 GMC Sierra, I see it blink and know my engine is protected. It’s a small detail, but it gives me confidence that the device is actually working.
Helpful? 0 0
marilys
I drive a 2018 Canyon with the 3.6L V6, and AFM made it feel jerky in stop‑and‑go traffic. FullForce smoothed everything out. The truck accelerates linearly now, and the transmission doesn’t hunt for gears as much.
Helpful? 0 0
Janell
I drive a 2019 Cadillac Escalade, and the AFM shudder was embarrassing with passengers in the car. FullForce eliminated it completely. The ride is quieter, smoother, and feels more premium—exactly what you expect from a luxury SUV.
Helpful? 0 0
Bailey
After 130k miles on my 2013 Silverado, I started hearing lifter tick. I installed FullForce as a last resort before a teardown. Six months later, the tick is gone, and the truck runs strong. I’m convinced it saved my engine.
Helpful? 0 0
lizicat
I was hesitant because some forums said OBD disablers don’t work on newer GM models. But FullForce worked perfectly on my 2020 Silverado 5.3L. No warning lights, no issues, and the engine feels more responsive without AFM cycling.
Helpful? 0 0
Yosemite Hamilton
My 2015 Suburban is my family hauler, and I wanted to protect it from lifter failure. FullForce has been installed for over a year now, and the engine still runs like it did at 50k miles. No shudder, no misfires, no regrets.
Helpful? 0 0
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Buy FullForce™ AFM/DFM Disabler

Fully reversible and compatible with 80+ GM trucks, SUVs, and performance cars, FullForce™ delivers confident, full-cylinder performance every time you drive.

Sale!

FullForce™ AFM/DFM Disabler (Official Retailer) 2026

Original price was: US$149.99.Current price is: US$79.75.