GMC Sierra 3500HD (2017) is 1324 mm (52.13 inch) longer, 230 mm (9.06 inch) wider, 417 mm (16.42 inch) higher and has 1564 liters (55.23 ft3) bigger cargo space than Kia Niro (2015).
Kia Niro (2015) is 966 kg (2,130 lbs) lighter than GMC Sierra 3500HD (2017).
