FIAT 500X (2017) is 1364 kg (3,007 lbs) lighter than GMC Sierra 3500HD (2017).
GMC Sierra 3500HD (2017) is 1426 mm (56.14 inch) longer, 239 mm (9.41 inch) wider, 369 mm (14.53 inch) higher and has 1641 liters (57.95 ft3) bigger cargo space than FIAT 500X (2017).