GMC Sierra 2500HD (2014) is 1169 mm (46.02 inch) longer, 93 mm (3.66 inch) wider, 680 mm (26.77 inch) higher and has 1368 liters (48.31 ft3) bigger cargo space than Mercedes AMG GT (2015).
Mercedes AMG GT (2015) is 1273 kg (2,806 lbs) lighter than GMC Sierra 2500HD (2014).