I believe whats happening is - The transmission is downshifting too early, and applying a significant and random amount of braking resistance. This braking goes off and on at random. It prevents the driver from braking in a controlled manner, as this random and unpredictable additional braking caused by - i think - the transmission is constantly changing. Therefore sometime my truck will randomly and suddenly slow down, then accelerate. As a driver, I am always trying to match the trucks random braking, and brake calmly. Its impossible to do. This has caused me to nearly rear end people at stop lights, Fly out of my lane and into oncoming traffic while turning, or other people nearly rear end me. It is hard to explain exactly whats happening, but imagine a second person stepping on and off the brakes, at random times, and trying to drive normally with this extra braking. Also, the E brake turns itself on at random times and will remain locked up and catches fire. Thats happened a few times The tailgate also doesnt latch properly and will come open while driving. I have had it at the dealer for service 4 seperate times, but since there are no codes, they have yet to fix anything. I refuse to drive it anymore