GMC Sierra 3500HD (2014) is 975 mm (38.39 inch) longer, 107 mm (4.21 inch) wider, 249 mm (9.80 inch) higher and has 1126 liters (39.76 ft3) bigger cargo space than Toyota Highlander (2014).
Toyota Highlander (2014) is 595 kg (1,312 lbs) lighter than GMC Sierra 3500HD (2014).