GMC Sierra 2500HD (2015) is 1228 mm (48.35 inch) longer, 185 mm (7.28 inch) wider, 518 mm (20.39 inch) higher and has 1217 liters (42.98 ft3) bigger cargo space than Kia Optima (2018).
Kia Optima (2018) is 29 kg (64 lbs) lighter than GMC Sierra 2500HD (2015).
