GMC Sierra 3500HD (2019) is 1666 mm (65.59 inch) longer, 241 mm (9.49 inch) wider, 496 mm (19.53 inch) higher and has 1417 liters (50.04 ft3) bigger cargo space than Mercedes GLA-Class (2015).
Mercedes GLA-Class (2015) is 1518 kg (3,347 lbs) lighter than GMC Sierra 3500HD (2019).