I've owned my duramax 2500 since sept. 2008, I use it for work which it has a 110 gallon fuel tank and a weather guard saddle tool box. In one year of use the bed is pushing out and cracking along the sides at the end of the tool box. I've own two Dodge 2500's and never had the problem, dealer states the problem as having to much weight. I think Chevy needs to build a better bed for the 2500's for guys who use their trucks for work. Also took the truck in three times to have interior tighten up do to rattles. Otherwise truck is not bad for pulling trailers and cruising around, don't put anything on bed rails!!!