GMC Sierra 2500HD (2020) is 1436 mm (56.54 inch) longer, 139 mm (5.47 inch) wider, 735 mm (28.94 inch) higher and has 1377 liters (48.63 ft3) bigger cargo space than Mercedes AMG GT (2014).
Mercedes AMG GT (2014) is 1124 kg (2,478 lbs) lighter than GMC Sierra 2500HD (2020).