What the DOT looks at is your axle weight ratings which is not the same as your OEM GCVWR. If I were a hot shot guy towing for a living I could register my truck with DOT to tow 48K if I wanted to. DOT doesn't give a crap about the OEM GCVWR. The OEM GCVWR is simply a marketing and liability number used by manufactures. The axles on your truck and trailer dictate what you can actually tow. Different states have different regs as well. Go to one of the many different hot shot websites and your point of view will be deflated very, very quickly. Because the manufacturers do not know what will be towed behind your truck they have no way of telling you what you can legally tow. If I went by the OEM number I could only tow 13,850. What a load of crap. That number is so underrated it's ridiculous. According to that logic all the guys with tandem dually trailers that weight around 8K can only put about 6K on them. That would rule out towing the bigger skid steers, backhoe's and a whole lot of other stuff. See how silly your logic is starting to look.