GMC Sierra 2500HD (2019) is 6 mm (0.24 inch) wider, 51 mm (2.01 inch) higher and has 311 liters (10.98 ft3) bigger cargo space than Toyota Tundra (2018).
Toyota Tundra (2018) is 114 mm (4.49 inch) longer and 229 kg (505 lbs) lighter than GMC Sierra 2500HD (2019).