GMC Sierra 3500HD (2015) is 1250 mm (49.21 inch) longer, 254 mm (10.00 inch) wider, 336 mm (13.23 inch) higher and has 1360 liters (48.03 ft3) bigger cargo space than Subaru Crosstrek (2018).
Subaru Crosstrek (2018) is 1263 kg (2,784 lbs) lighter than GMC Sierra 3500HD (2015).