GMC Sierra 2500HD (2015) is 1791 mm (70.51 inch) longer, 265 mm (10.43 inch) wider, 555 mm (21.85 inch) higher and has 1386 liters (48.95 ft3) bigger cargo space than Mercedes A-Class (2019).
Mercedes A-Class (2019) is 194 kg (428 lbs) lighter than GMC Sierra 2500HD (2015).