GMC Sierra 3500HD (2015) is 490 mm (19.29 inch) longer, 6 mm (0.24 inch) wider, 19 kg (42 lbs) lighter and has 106 liters (3.74 ft3) bigger cargo space than Toyota Sequoia (2018).
Toyota Sequoia (2018) is 5 mm (0.20 inch) higher than GMC Sierra 3500HD (2015).