GMC Sierra 3500HD (2017) is 393 mm (15.47 inch) longer, 6 mm (0.24 inch) wider, 52 mm (2.05 inch) higher and has 578 liters (20.41 ft3) bigger cargo space than Nissan Armada (2016).
Nissan Armada (2016) is 185 kg (408 lbs) lighter than GMC Sierra 3500HD (2017).