FIAT 500L (2015) is 1284 kg (2,831 lbs) lighter than GMC Sierra 2500HD (2018).
GMC Sierra 2500HD (2018) is 1553 mm (61.14 inch) longer, 251 mm (9.88 inch) wider, 311 mm (12.24 inch) higher and has 1306 liters (46.12 ft3) bigger cargo space than FIAT 500L (2015).