GMC Sierra 3500HD (2018) is 1153 mm (45.39 inch) longer, 96 mm (3.78 inch) wider, 688 mm (27.09 inch) higher and has 1641 liters (57.95 ft3) bigger cargo space than Mercedes AMG GT (2019).
Mercedes AMG GT (2019) is 1070 kg (2,359 lbs) lighter than GMC Sierra 3500HD (2018).