Wife noticed truck felt funny backing out of driveway, so pulled back into garage. I took a look, Center diff lock light was on and vsc off. It took a while to get it off, pushed the button, I don't know if I wasn't waiting long enough. I read to try to pull out and back again as she would have entered garage last night and hit button. Finally went out. I'm wondering how this happened. She's not that big for her knee to hit the button. She did drive on ice last night and alot of salt on our roads, would that have anything to do with it? It's a 2007 V8, so always in 4WD. So I guess I'm wondering, can it happen on it's own, or did she end up hitting the button, unloading something.