This forum seamed to be the most active. Im new here but not new to forums. I just bought a 2014 GMC Sierra about a month ago My first new general motors truck. I like the style and everything about it except the death vibration from the back that's been there since I bought the truck. I know they wont even attempt to fix the problem now with the drop and wheels but as long as I don't go over 63 Im good I think..