To safely carry a stock box, your pickup truck should have a GVWR that is greater than the combined weight of the box, animals, and everything else that will be riding in your truck. To calculate this, start by finding the GVWR of your vehicle. This number is usually printed on the driver’s side door jamb, in the owner’s manual of your truck, or on the manufacturer’s website. Once you’ve found that number, jot it down. Now, it’s time to calculate how much weight you will be carrying. You can start by finding the curb weight of your stock box (this refers to how much the stock box weighs when it is empty). Estimate the weight of all passengers, equipment, gear, etc. that will be in the truck. As long as your vehicle’s GVWR is greater than this total weight, it will be safe to carry the stock box and animals.