We ordered them with our sierra 365saq and of course the will leak. They are just a plastic tub with a flip up lid. We store all of our "dirty" stuff in them. I added a peice of plywood to the bottom of each one. We have one on each side. Because they were sagging in the middle, even though I don't have the 100lbs max they say. They are super handy. I want to order another set a put them under somewhere else.
2014 Sierra 365 SAQ
2014 F350 CC DRW lariat ultimate kodiak brown, 65 gallon titan fuel tank, bak flip box cover, many mods to come.