GMC Sierra 3500HD (2020) is 706 mm (27.80 inch) longer, 62 mm (2.44 inch) wider, 69 mm (2.72 inch) higher and has 557 liters (19.67 ft3) bigger cargo space than Nissan Armada (2015).
Nissan Armada (2015) is 380 kg (838 lbs) lighter than GMC Sierra 3500HD (2020).