GMC Sierra 3500HD (2015) is 845 mm (33.27 inch) longer, 175 mm (6.89 inch) wider, 486 mm (19.13 inch) higher and has 1481 liters (52.30 ft3) bigger cargo space than Kia Optima (2016).
Kia Optima (2016) is 1113 kg (2,454 lbs) lighter than GMC Sierra 3500HD (2015).
