GMC Sierra 2500HD (2014) is 3 mm (0.12 inch) wider, 44 mm (1.73 inch) higher and has 302 liters (10.66 ft3) bigger cargo space than Toyota Tundra (2016).
Toyota Tundra (2016) is 99 mm (3.90 inch) longer and 396 kg (873 lbs) lighter than GMC Sierra 2500HD (2014).