GMC Sierra 3500HD (2018) is 454 mm (17.87 inch) longer, 136 mm (5.35 inch) wider, 487 mm (19.17 inch) higher and has 1491 liters (52.65 ft3) bigger cargo space than Mercedes S-Class (2019).
Mercedes S-Class (2019) is 570 kg (1,257 lbs) lighter than GMC Sierra 3500HD (2018).