Conventional towing maxes out at 14,500 pounds for most versions of the Sierra 3500HD. However, dually versions of the gas truck go up to 16,800 pounds, while diesel-equipped dually versions are ...

It tops out at 7,290 pounds, provided by the regular cab, long bed, RWD dually gasoline variant. For conventional towing, the Sierra 3500HD goes as high as 20,000 pounds with the diesel engine.