GMC Sierra 3500HD (2016) is 846 mm (33.31 inch) longer, 110 mm (4.33 inch) wider, 221 mm (8.70 inch) higher and has 1126 liters (39.76 ft3) bigger cargo space than Toyota Highlander (2016).
Toyota Highlander (2016) is 675 kg (1,488 lbs) lighter than GMC Sierra 3500HD (2016).