GMC Sierra 2500HD (2014) is 1298 mm (51.10 inch) longer, 228 mm (8.98 inch) wider, 475 mm (18.70 inch) higher and has 1297 liters (45.80 ft3) bigger cargo space than Mercedes GLA-Class (2015).
Mercedes GLA-Class (2015) is 1523 kg (3,358 lbs) lighter than GMC Sierra 2500HD (2014).