FIAT 500X (2016) is 1523 kg (3,358 lbs) lighter than GMC Sierra 2500HD (2014).
GMC Sierra 2500HD (2014) is 1467 mm (57.76 inch) longer, 236 mm (9.29 inch) wider, 369 mm (14.53 inch) higher and has 1368 liters (48.31 ft3) bigger cargo space than FIAT 500X (2016).