GMC Sierra 3500HD (2016) is 1044 mm (41.10 inch) longer, 145 mm (5.71 inch) wider, 292 mm (11.50 inch) higher and has 1641 liters (57.95 ft3) bigger cargo space than Mercedes GLC-Class (2017).
Mercedes GLC-Class (2017) is 599 kg (1,321 lbs) lighter than GMC Sierra 3500HD (2016).