I just had this feature activated yesterday at the dealer ship yesterday. So like TC said, it wasn't shaded out, and it does work. Although I think it is kind of dumb how it works though. I had it set for 5 minutes and it does shut the engine off in five minutes, but it leaves the ignition in the on position so the air conditioning fan says going, and everything else as if the truck is running with the engine off!!! So you couldn't just lock the doors and walk away to leave it to shut off in 5 minutes, you'd have to come back and actually turn the ignition to off. Kind of dumb unless I'm missing something. I haven't left it long enough to see if the ignition would just shut down on it's own like the accessory position will when you are just sitting there listening to music or something and it times out on you. If the ignition stays on continuously, I'll probably get the dealer to turn it off, what a joke if that is the case. Also, if you are sitting in a construction lineup or at a rail crossing waiting, you had better hit the brakes once in a while so it doesn't shut down on you. The timer works from the point of the last activity on the brake or throttle. The first time it actually worked for me yesterday, I was sitting at a rail crossing waiting and literally seconds before I was going to put my foot on the brake to shift into gear, the truck shut off!!!! good timing! Has anyone else actually used this on a 2013/14 yet?