GMC Sierra 3500HD (2015) is 1250 mm (49.21 inch) longer, 255 mm (10.04 inch) wider, 336 mm (13.23 inch) higher and has 1611 liters (56.89 ft3) bigger cargo space than Subaru XV (2017).
Subaru XV (2017) is 1263 kg (2,784 lbs) lighter than GMC Sierra 3500HD (2015).