My '15 F350 diesel DRW weighs just 20# shy of 8000 empty, GVWR is 14,000. With the Bigfoot 10.4 on, fuel and water full and gear aboard, 12,400 lbs. So plenty of headroom. Still, the suspension sags significantly in the back, no where near the bump stops but it needs help to keep the headlights on the road. These new 1T trucks carry a lot, but compromises to ride quality seem to be made (compromises which fail, IMO). There is no doubt at all that it carries the weight better than the '99 that I replaced.