FIAT 500X (2018) is 1537 kg (3,389 lbs) lighter than GMC Sierra 2500HD (2016).
GMC Sierra 2500HD (2016) is 1435 mm (56.50 inch) longer, 239 mm (9.41 inch) wider, 381 mm (15.00 inch) higher and has 1368 liters (48.31 ft3) bigger cargo space than FIAT 500X (2018).