Range AFM Disabler
Racer
Joined: Aug 2024
Posts: 291
Likes: 255
From: Florida
According to information I have read, Range has corrected that issue and the latest versions show no signs of drainage. I would suggest purchasing from them directly should decide on this disabler to ensure you receive the latest version. Or verifying the version if purchasing second hand. I leave mine in and have had no problems (I also keep the car on a battery maintainer when not in use). Hope this helps. 
Team Owner
Joined: Jul 2004
Posts: 28,475
Likes: 3,291
From: Hartford WI
If you get a Diablo and pay Diablew a few bucks more, he can give you a better ECM and TCM program and you will cut off the AFM. It won't wear down your battery any more than your car is already doing. You can increase the throttle tip in a bit through the mapping and not have to ever rely on the foolers to give you more throttle. You can have better shifts if you are an auto.
Heel & Toe
Joined: Oct 2025
Posts: 17
Likes: 9
I use a Max Cylinder afm disabler. Made in USA. About $70 less than a Range device. It turns Off with the ignition, so no battery drain. It works great.
Instructor
Joined: Mar 2024
Posts: 164
Likes: 126
From: Eagle River, WI
Heel & Toe
Joined: Oct 2025
Posts: 17
Likes: 9
Works with most GM V6 and V8 engines, including Chevy Silverado 5.3L, 6.2L, and other popular GM trucks and SUVs from 2004–2020.
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Team Owner
Joined: Jul 2004
Posts: 28,475
Likes: 3,291
From: Hartford WI
The lifters are the weak spot. It is said that you can lower the chance of it happening although nobody has been able to say specifically by how much. Take it FWIW. If I planned to keep the car forever, I would add a stockish cam that didn't have AFM but I wouldn't want to waste money if I didn't plan to keep it forever.