Take a very close look at the driver door sticker, it will give you GVWR an the FRT and REAR axle load ratings, there will also be a sticker that provides your payload (gas, passengers, carrying bed capacity). Depending on the options your truck came from factory with this number may vary. But with these numbers and the numbers you can get from running your VIN through Dodges VIN decoder you can obtain the GCWR total weight of truck, contents and trailer, and contents you can see if the truck is up to the job.