GMC Sierra 2500HD (2017) is 1154 mm (45.43 inch) longer, 96 mm (3.78 inch) wider, 687 mm (27.05 inch) higher and has 1368 liters (48.31 ft3) bigger cargo space than Mercedes AMG GT (2016).
Mercedes AMG GT (2016) is 959 kg (2,114 lbs) lighter than GMC Sierra 2500HD (2017).