GMC Sierra 3500HD (2018) is 749 mm (29.49 inch) longer, 112 mm (4.41 inch) wider, 201 mm (7.91 inch) higher and has 1677 liters (59.22 ft3) bigger cargo space than Volvo XC90 (2015).
Volvo XC90 (2015) is 365 kg (805 lbs) lighter than GMC Sierra 3500HD (2018).
