GMC Sierra 3500HD (2016) is 6 mm (0.24 inch) wider, 26 mm (1.02 inch) higher and has 575 liters (20.31 ft3) bigger cargo space than Toyota Tundra (2019).
Toyota Tundra (2019) is 114 mm (4.49 inch) longer and 177 kg (390 lbs) lighter than GMC Sierra 3500HD (2016).