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I wouldn't drive down the street with those tires on a HD pickup let alone pull anything. you got to get minimum 3000 lb rating and d rated(8ply). A better choice would be e rated (10 ply).
Mine would come close to overloading those tires on the front axle with nothing but me in the truck.
You don't give much information on the tire, I would suggest looking for an LT designated tire - it means stiffer sidewalls and a more stable towing experience.