My new 2010 Titan SE CC 4X4 BED is not level with the cab when you look at it from the rear. If you line up the top of the tailgate to the rear window weather stripping it's higher on the left side of the truck. I've checked it on several flat locations. What could that be? I only have 700 miles on it. I guess the dealer will have to look at it on the first free oil change at 3k.