GMC Sierra 3500HD (2016) is 845 mm (33.27 inch) longer, 175 mm (6.89 inch) wider, 486 mm (19.13 inch) higher and has 1481 liters (52.30 ft3) bigger cargo space than Kia Optima (2016).
Kia Optima (2016) is 1109 kg (2,445 lbs) lighter than GMC Sierra 3500HD (2016).
