GMC Sierra 2500HD (2017) is 1285 mm (50.59 inch) longer, 295 mm (11.61 inch) wider, 506 mm (19.92 inch) higher and has 1333 liters (47.07 ft3) bigger cargo space than Subaru Impreza GP (2014).
Subaru Impreza GP (2014) is 1209 kg (2,665 lbs) lighter than GMC Sierra 2500HD (2017).