I have a 2017 GMC Sierra 1500 with a 6.2L engine Texas Edition. So far the dealer has replaced the torque converter and flushed the transmission. The issue still remains when it shifts from V8 to V4. Now the dealer tells me it might be the transmission that is at fault. I purchased the AFM disabler from RANGE to prove to the dealership that it is the AFM system at fault. So far with the AFM disabled, not one single issue. I run it without the RANGE on speeds it doesn't cause the issue but 75% of the time its disabled. Caution... the RANGE disabler will drain the battery if left on for a long period of time.