GMC Sierra 2500HD (2014) is 1059 mm (41.69 inch) longer, 142 mm (5.59 inch) wider, 310 mm (12.20 inch) higher and has 1368 liters (48.31 ft3) bigger cargo space than Mercedes GLC-Class (2015).
Mercedes GLC-Class (2015) is 818 kg (1,803 lbs) lighter than GMC Sierra 2500HD (2014).