GMC Sierra 2500HD (2018) is 845 mm (33.27 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 1044 kg (2,302 lbs) lighter than GMC Sierra 2500HD (2018).
