GMC Sierra 1500 (2017) is 811 mm (31.93 inch) longer, 198 mm (7.80 inch) wider, 256 mm (10.08 inch) higher and has 1293 liters (45.66 ft3) bigger cargo space than Mercedes GLA-Class (2020).
Mercedes GLA-Class (2020) is 427 kg (941 lbs) lighter than GMC Sierra 1500 (2017).