GMC Sierra 3500HD (2020) is 1128 mm (44.41 inch) longer, 151 mm (5.94 inch) wider, 300 mm (11.81 inch) higher and has 1105 liters (39.02 ft3) bigger cargo space than Toyota Highlander (2018).
Toyota Highlander (2018) is 745 kg (1,642 lbs) lighter than GMC Sierra 3500HD (2020).