GMC Sierra 3500HD (2017) is 844 mm (33.23 inch) longer, 175 mm (6.89 inch) wider, 507 mm (19.96 inch) higher and has 1481 liters (52.30 ft3) bigger cargo space than Kia Optima (2017).
Kia Optima (2017) is 1154 kg (2,544 lbs) lighter than GMC Sierra 3500HD (2017).
