I don't have the advertised numbers for everything, but I used to have a 2008 3400rl so I can come close.
For sure, the tank capacities are two 45 gal. greys, one 45 gal. black, 75 gal. fresh water.
For sure the GVWR is 14,000. Two 6k axles.
Guess on the pin weight, is around 2,000 empty. Maybe around 2,600 loaded.
Guess on the empty weight is around 12,000.
Hope this helps some.
Peace
Dave