One a one ton SRW, you will run out of gvwr or gawr on the truck long before you run out of weight you can pull. Keep in mind that a fiver with 16k gvwr will have a 20 to 25 percent pin weight. That will be your limiting factor. The best thing to do if read the sticker on your new truck and determine what the available cargo capacity is from the factory, then deduct how ever many pounds the hitch, cargo, passengers, pets, etc weigh and the difference is a safe way to determine what you have left for pin weight.