GMC Yukon XL (2017) is 523 mm (20.59 inch) longer, 155 mm (6.10 inch) wider, 231 mm (9.09 inch) higher and has 1822 liters (64.34 ft3) bigger cargo space than Mercedes GLC-Class (2016).
Mercedes GLC-Class (2016) is 606 kg (1,336 lbs) lighter than GMC Yukon XL (2017).