You’re probably 8500-10000lbs, depending on your load out. My 2500 Cumins weighs 10,200 fully loaded. I went with 1”. It’s break strength is 30k. Also, keep in mind the weighting on the rope is for the vehicle being pulled. Unless you constantly wheel with other full size rigs, the 1.5” might be overkill. It won’t stretch enough to give its full potential if your tugging on a Taco. It also takes up a lot more space.