I have a 2016 Silverado crew cab and the rear drivers side door will only open half way. I managed to get it once and it seemed a little wet and icy. Later that day it did it again and now it's not giving way. I'm thawing the thing out in my dad's garage tonight so I guess we will see what the morning brings. If that's not it, any ideas? Obviously it's under warranty but still kind of annoying.