So i have a 15' Laramie, bought it used and immediately purchased a used ECM from a junk yard, sent it in to GDE and had it tuned. Love the Hot tune. Anyway, i swapped out the GDE ECM, put in the stock and got the A08 AEM for the refund. Picked up my Truck Monday night and have been driving it all week with the stock updated tune. Very first thing i noticed when i left the parking lot was absolutely no pedal delay at all, zip, zero, nada, instant throttle response. Now it still has the lazy down shift coming up to a stop sign and doing a roll and go, but the pedal response is instant. One other thing i noticed is it does not hold 8th gear for squat, shifts out very easy the second i press the pedal. If i did not have the Hot Tune i would be very happy with it as it is, although it does not have nearly the power for passing or out of the hole as the Hot Tune, along with the other benefits so I will be putting the GDE ECM back in. Just thought i would share.