This video is to correct some descriptions of the Chevy Avalanche where the bed is shown as 5.4 feet long. The fact is, when the rear seats are folded down and the rear window and bulkhead are laid down as bed floor, the usable bed is 8 feet by 4 feet and easily takes full size wall board or plywood flat on the floor. The height of anything you might want to load is limited by the roof height, but it holds a lot more than you would expect.