Range Disabler no worky on my 2020 8 speed

[Travis Crawford]

I purchased a used range and it flashes the software version and appears to be working... But I'm pretty positive it's not disabling the dfm, and intermittently it will still autostop. I originally thought it was due to the older firmware version, so I sent it in and had range update it. Same results. 

 

How can I confirm its not working? I never really used it because I couldn't tell the difference. I just had to have 4 lifters and pushrods replaced at 4500 miles

Edited March 25, 2021 by Travis Crawford

[Jac365]

I had the range from my old 2012 Sierra updated to use in my 2019 Sierra. The Range disables the auto stop MOST of the time, it's not 100% with the auto stop, more like 98/99%. That is just a bonus.The real intent of the box is to disable DFM. In my case I can tell by listening to my exhaust tone.(Borla S type cat back)

 

Even with the aftermarket exhaust it is still hard to pick up on. Having driven the truck for a time without the Range and now with it I can detect the difference in tone that tells me it running on all eight cylinders. That and the throttle response difference to me is noticeable.

 

Lifter replacement at 4500 miles is not a good thing!!!