GMC Sierra 3500HD (2019) is 269 mm (10.59 inch) longer, 16 mm (0.63 inch) wider, 65 mm (2.56 inch) higher and has 422 liters (14.90 ft3) bigger cargo space than Toyota Tundra (2019).
Toyota Tundra (2019) is 391 kg (862 lbs) lighter than GMC Sierra 3500HD (2019).