GMC Sierra 2500HD (2017) is 1283 mm (50.51 inch) longer, 231 mm (9.09 inch) wider, 482 mm (18.98 inch) higher and has 1297 liters (45.80 ft3) bigger cargo space than Mercedes GLA-Class (2015).
Mercedes GLA-Class (2015) is 1209 kg (2,665 lbs) lighter than GMC Sierra 2500HD (2017).