What GCWR means, and why it can lower what you tow
GCWR, the gross combined weight rating, is the most the loaded vehicle and the loaded trailer may weigh together. If the truck is carrying a lot, the trailer has to be lighter to stay under it.
Two limits apply at once
A towing table gives a maximum trailer weight. Next to it, most manufacturers also print a GCWR for the same configuration. You have to stay under both.
Ford's guide puts it as a sum: the weight of the loaded vehicle plus the weight of the loaded trailer is the gross combination weight, and that must not exceed the GCWR.
For example, the top-rated 2026 Ford F-150 (SuperCrew 4x4 157.2" WB, 3.5L GTDI V6) is listed with a maximum trailer weight of 13,500 lbs and a GCWR of 19,400 lbs.
Why the advertised number assumes a nearly empty truck
Ford states that its maximum loaded trailer weights assume a vehicle with only mandatory options, no cargo, and a driver and one passenger at 150 lbs each. The weight of extra options, passengers, cargo and the hitch has to be taken off the trailer figure.
Other manufacturers word it differently, but the idea is the same: the headline rating is for a lightly loaded vehicle. A family, a full bed and a heavy hitch all count.
Where to find yours
GCWR is in the manufacturer's towing guide or the owner's manual. It is usually not on the door-jamb label, which carries the vehicle's own weight rating (GVWR) and axle ratings.
Where a manufacturer prints GCWR beside a rating, our tables show it in its own column. We leave it out for a few models where the manufacturer's own GCWR figures contradict the same page.
This explains the terms. The limits for your own vehicle are on its door-jamb label and in its owner's manual.