I put a brand new range device with the latest update on my 16 Sierra Denali 5.3 with 8 speed transmission it worked for a day then got CEL and driving crappy called range directly and they told me that it dosent support the 8 speed tranny yet and to try back in a month or so to see if they have solved the problem. My question is has anybody tried the Diablo sport sprint AFM deactivation device that's the same exact thing as range only turns off AFM I was told there's works with the 8 speed