GMC Sierra 3500HD (2019) is 1791 mm (70.51 inch) longer, 265 mm (10.43 inch) wider, 557 mm (21.93 inch) higher and has 1497 liters (52.87 ft3) bigger cargo space than Mercedes A-Class (2016).
Mercedes A-Class (2016) is 1518 kg (3,347 lbs) lighter than GMC Sierra 3500HD (2019).