Last month I bought an 02 2500HD CC LT, w/Duramax and Allison and lots of other goodies. To my surprise, it won't accept a truck stop nozzle. The nozzle and the fuel tank filler neck are the same size, so the nozzle won't go down far enough. I found a company that sells an after market re-fueling neck for $85. I wrote Chevrolet about this, but havn't heard back yet. Has anyone else experienced this problem?