Unless you have a tiny fifth wheel or an empty aux tank, you will be over. Worry about your rear tire capacities instead.
You're "probably" safe going over GVWR as long as you aren't running commercial. 10K is an artificial number used to make it a class 2B vehicle for tax purposes. It means very little from a technical standpoint. That being said, the amount of liability you want to assume is up to you. 90pct or more of the 2500HDs you see pulling 5'ers are "overloaded". I don't believe that to be an exaggeration. The major limiting factor for a stock 2500HD is the rear tire capacity. If you have 20s, even more so. 6200# RAWR or you'll be over.