GMC Sierra 2500HD (2014) is 860 mm (33.86 inch) longer, 172 mm (6.77 inch) wider, 504 mm (19.84 inch) higher and has 1208 liters (42.66 ft3) bigger cargo space than Kia Optima (2015).
Kia Optima (2015) is 1373 kg (3,027 lbs) lighter than GMC Sierra 2500HD (2014).
