GMC Sierra 3500HD (2015) is 1307 mm (51.46 inch) longer, 249 mm (9.80 inch) wider, 394 mm (15.51 inch) higher and has 1505 liters (53.15 ft3) bigger cargo space than Mercedes B-Class (2017).
Mercedes B-Class (2017) is 1308 kg (2,884 lbs) lighter than GMC Sierra 3500HD (2015).