GMC Sierra 3500HD (2020) is 1127 mm (44.37 inch) longer, 216 mm (8.50 inch) wider, 560 mm (22.05 inch) higher and has 1460 liters (51.56 ft3) bigger cargo space than Kia Optima (2017).
Kia Optima (2017) is 1209 kg (2,665 lbs) lighter than GMC Sierra 3500HD (2020).
