FYI, the sticker on the door jamb is as useless as tits on a bull if you replaced your stock tires/rims with ones that have a lower rating. It also goes out the door if replaced any suspension components with a lift.
Case in point, my nephew replaced his stock rims and tires on his 3500 with 35x12.5x20 BFG T/A KO2's which has a max rating of 3,195 lbs. The 6,390 lb combined rating of the new tires had a lower rating than his stock axle rating of 7,000 lbs which effectively lowered his GAWR making the number on the door sticker worthless. It actually put him below the rear GAWR of my 2500 which is 6,500 lbs.