GMC Sierra 2500HD (2020) is 1127 mm (44.37 inch) longer, 218 mm (8.58 inch) wider, 554 mm (21.81 inch) higher and has 1287 liters (45.45 ft3) bigger cargo space than Kia Optima Sportswagon (2017).
Kia Optima Sportswagon (2017) is 1054 kg (2,324 lbs) lighter than GMC Sierra 2500HD (2020).