GMC Sierra 3500HD (2019) is 1228 mm (48.35 inch) longer, 185 mm (7.28 inch) wider, 520 mm (20.47 inch) higher and has 1285 liters (45.38 ft3) bigger cargo space than Kia Optima Sportswagon (2015).
Kia Optima Sportswagon (2015) is 1363 kg (3,005 lbs) lighter than GMC Sierra 3500HD (2019).