What I read is that the stock programming won't let you power brake for fear of overwhelming the brakes. You have to have the "auto hold" feature on. That is where you stop the truck and the green light comes on and the truck will stay stopped until you press the accelerator. With that feature on, you can power brake. I've done this and tried the different modes and with traction control turned on and off, but when I power brake like this anywhere from 500rpm to 2000, when I let off the brake and hit the gas it's like there is a one second delay. It just hardly goes anywhere for a second and then roars to life. I also put a banks pedal monster on it to see if that changed it and it didn't. When I'm just at a stop light and I'm not trying to "launch" it, it feels like it reacts faster. I can't figure it out.