I do not know if it helps or confuses the discussion but I thought I would provide the specifics of my situation. If it helps clarify, great. If not, ignore!
According to the scales at our local Recycling Centre, our TV weighs approximately 7,900 lbs when we are on board along with our clothes, a full load of diesel, etc. but WITHOUT the 5er attached. The 5er has a GVWR of 13,975 lbs. So if the RV were loaded to its max (which it NEVER is), my GCWR (the total weight I am actually moving down the road) would be 7,900 lbs + 13,975 lbs = 21,875 lbs, well within the truck's 23,000 lbs limit.
In my case (and the case of many people hauling large 5ers), a far greater concern is the truck's GVWR of 9,900 lbs. Given that the truck weighs 7,900 lbs when loaded for the road, I have 2,000 lbs left for the pin weight if I am to stay within the GVWR. The "out the factory door" pin weight on my 5er is listed as either 1,770 lbs. or 1,975 lbs, depending on which set of specs you look at. I assume the larger number. The fact that I am carrying two batteries and two 30 lb. LP tanks immediately eliminates any possibility that my pin weight is 2,000 lbs or less. So I am overweight.
Because of this situation, I do not carry anything in the 5er (and especially in the "basement") that is not absolutely necessary. The total weight of everything I carry in the basement (water hoses, shore power line, etc) is less than 100 lbs. The unit came equipped with one of those "sliding trays" in the basement. It weighs 85 lbs. I got rid of it. I do not carry a generator in the front hatch. Because we do not do any drycamping or boondocking at this point, I am seriously considering removing one of the batteries. In short, I am doing everything I can to keep my pin weight as close to 2,000 lbs as possible.
That having been said, the Gross Axle Weight Ratings (GAWR) on my truck are 5,200 lbs in the front and 6,200 lbs in the rear. The combined GAWR for the truck is thus 11,400 lbs, 1,500 lbs greater than the GVWR. The tires on the rear of my truck are rated to carry 3,100 lbs/tire @ 75 psi. Note that the combined weight-carrying capacity of the tires is precisely the GAWR of the rear axle.
Finally, the specs on my truck state that, when unloaded, the distribution of weight in the truck is 60% on the front axle and 40% on the rear axle. Using that as an approximation, that would indicate that 40% of the 7,900 lbs loaded weight (stated above) is being carried by the rear. Thus, .4 x 7,900 = 3,160 lbs. In order to remain within the 6,200 lbs GAWR of the rear axle, my pin weight must thus be 6,200 - 3,160 = 3,040 lbs. I am absolutely confident that I am not even remotely close to a pin weight of 3,000 lbs.
Without any question, my truck WILL handle the weight (both the pin weight and the total weight) of my 5er. The issue, however, is one which many members of this forum discuss frequently ... can your truck handle the weight SAFELY and CONTROL the weight in an emergency situation on the highway? This question explains my paranoia about removing every lb of unnecessary weight, my absolute refusal to travel at speeds in excess of 100 km/hour (62 mph), and my willingness to spend (probably over-spend) whatever money is necessary to ensure myself that both my truck and my RV (especially brakes and tires) are in the very best mechanical and operating condition possible at all times. I have had one emergency situation on a high-speed, multi-lane highway within a densly-populated urban area. It actually occurred during the road test for my Class A driver's license! The truck and the RV stopped quickly, in a totally straight line, without locking the brakes, and with no damage of any kind. That convinced me that my paranoias are well-directed!
Bill