GMC Sierra 1500 (2018) is 865 mm (34.06 inch) longer, 221 mm (8.70 inch) wider, 236 mm (9.29 inch) higher and has 1114 liters (39.34 ft3) bigger cargo space than Mitsubishi Outlander Sport (2017).
Mitsubishi Outlander Sport (2017) is 515 kg (1,135 lbs) lighter than GMC Sierra 1500 (2018).