The maximum towing package combines the 6.0-liter V8 engine and four-speed automatic transmission with a heavy-duty 9.5-inch rear axle, locking differential, 4.10 axle ratio, heavy-duty cooling system and other enhanced features to enable a towing capacity of 10,500 pounds (4,763 kg). The payload maxes out at 2,160 pounds. Denali models tow up to 8,500 pounds and accommodate a payload of 1,719 pounds. Our experience towing at 10,000 lbs. was superb, with plenty of vehicle control under braking, at speed, and through corners. The cabin was civilized while towing a large horse trailer, with just some minor additional noise.