FIAT 500L (2015) is 1394 kg (3,073 lbs) lighter than GMC Sierra 3500HD (2017).
GMC Sierra 3500HD (2017) is 1552 mm (61.10 inch) longer, 251 mm (9.88 inch) wider, 312 mm (12.28 inch) higher and has 1579 liters (55.76 ft3) bigger cargo space than FIAT 500L (2015).