GMC Sierra 3500HD (2017) is 1282 mm (50.47 inch) longer, 231 mm (9.09 inch) wider, 483 mm (19.02 inch) higher and has 1570 liters (55.44 ft3) bigger cargo space than Mercedes GLA-Class (2014).
Mercedes GLA-Class (2014) is 1319 kg (2,908 lbs) lighter than GMC Sierra 3500HD (2017).