GMC Sierra 3500HD (2018) is 1359 mm (53.50 inch) longer, 345 mm (13.58 inch) wider, 572 mm (22.52 inch) higher and has 1651 liters (58.30 ft3) bigger cargo space than Subaru Impreza GJ (2015).
Subaru Impreza GJ (2015) is 1495 kg (3,296 lbs) lighter than GMC Sierra 3500HD (2018).