On my present rig, A 96 Chevy Cheyenne 3500 dually I have a 10000 pound rating. My rig has been weighed in at 13500 by a dot officer in NC. It was a 180 ticket. The problem was not the weight but the registered weight. I registered it for 15000 when I got home and all is well.
Normally I am not so over weighted. I usually run it about 12000 lbs. I have an extra leaf in the rear which is 700 a piece and I can reduce my cab weight by 2.5 people because it was originally a crew cab work truck. Chevy includes 150 pounds per person in the calculation times 5 people is 750 lbs. Between me, my wife and two ten pound dogs that equals roughly another 380 pounds. 750 - 370 = 380
So in my little world this puts me at about a GVWR of 10.220 pounds. Bingo.
In reality I still weigh 12000 lbs so I upgraded my front brakes as well.
I have a combined axle weight of 11700. All in all not so bad.
Take what you want out of this......