GMC Sierra 2500HD (2016) is 844 mm (33.23 inch) longer, 175 mm (6.89 inch) wider, 506 mm (19.92 inch) higher and has 1208 liters (42.66 ft3) bigger cargo space than Kia Optima (2018).
Kia Optima (2018) is 1403 kg (3,093 lbs) lighter than GMC Sierra 2500HD (2016).
