FIAT 500 (2014) is 1775 kg (3,913 lbs) lighter than GMC Sierra 3500HD (2018).
GMC Sierra 3500HD (2018) is 2149 mm (84.61 inch) longer, 408 mm (16.06 inch) wider, 489 mm (19.25 inch) higher and has 1806 liters (63.78 ft3) bigger cargo space than FIAT 500 (2014).