With the high torque rating, weight and full frame it should tow better than most mid-size trucks. I also have the new diesel Canyon 6’ bed and love the mileage without a trailer— been 25-30 mpg. I haven’t towed anything but suspect your mileage will drop in half.The new gmc diesel option canyon has a 7500 lb towing capacity.
so is it capable of towing a 5600lb 29’ dual axle travel trailer?