FIAT 500X (2018) is 1492 kg (3,289 lbs) lighter than GMC Sierra 2500HD (2014).
GMC Sierra 2500HD (2014) is 1451 mm (57.13 inch) longer, 236 mm (9.29 inch) wider, 374 mm (14.72 inch) higher and has 1368 liters (48.31 ft3) bigger cargo space than FIAT 500X (2018).