FIAT 500X (2017) is 1349 kg (2,974 lbs) lighter than GMC Sierra 3500HD (2016).
GMC Sierra 3500HD (2016) is 1427 mm (56.18 inch) longer, 239 mm (9.41 inch) wider, 343 mm (13.50 inch) higher and has 1641 liters (57.95 ft3) bigger cargo space than FIAT 500X (2017).