FIAT 500L (2015) is 1379 kg (3,040 lbs) lighter than GMC Sierra 3500HD (2016).
GMC Sierra 3500HD (2016) is 1553 mm (61.14 inch) longer, 251 mm (9.88 inch) wider, 286 mm (11.26 inch) higher and has 1579 liters (55.76 ft3) bigger cargo space than FIAT 500L (2015).