FIAT 500L (2016) is 1262 kg (2,782 lbs) lighter than GMC Sierra 3500HD (2018).
GMC Sierra 3500HD (2018) is 1470 mm (57.87 inch) longer, 262 mm (10.31 inch) wider, 308 mm (12.13 inch) higher and has 1793 liters (63.32 ft3) bigger cargo space than FIAT 500L (2016).