GMC Sierra 3500HD (2016) is 845 mm (33.27 inch) longer, 175 mm (6.89 inch) wider, 481 mm (18.94 inch) higher and has 1481 liters (52.30 ft3) bigger cargo space than Kia Optima (2017).
Kia Optima (2017) is 1139 kg (2,511 lbs) lighter than GMC Sierra 3500HD (2016).
