FIAT 500X (2016) is 194 kg (428 lbs) lighter than GMC Sierra 2500HD (2015).
GMC Sierra 2500HD (2015) is 1835 mm (72.24 inch) longer, 249 mm (9.80 inch) wider, 388 mm (15.28 inch) higher and has 1377 liters (48.63 ft3) bigger cargo space than FIAT 500X (2016).