GMC Sierra 3500HD (2018) is 423 mm (16.65 inch) longer, 21 mm (0.83 inch) wider, 596 kg (1,314 lbs) lighter and has 578 liters (20.41 ft3) bigger cargo space than Nissan Armada (2014).
Nissan Armada (2014) is 4 mm (0.16 inch) higher than GMC Sierra 3500HD (2018).