GMC Sierra 2500HD (2015) is 1659 mm (65.31 inch) longer, 241 mm (9.49 inch) wider, 494 mm (19.45 inch) higher and has 1306 liters (46.12 ft3) bigger cargo space than Mercedes GLA-Class (2016).
Mercedes GLA-Class (2016) is 194 kg (428 lbs) lighter than GMC Sierra 2500HD (2015).