GMC Sierra 3500HD (2018) is 1459 mm (57.44 inch) longer, 260 mm (10.24 inch) wider, 692 mm (27.24 inch) higher and has 1748 liters (61.73 ft3) bigger cargo space than Toyota GT86 (2017).
Toyota GT86 (2017) is 1500 kg (3,307 lbs) lighter than GMC Sierra 3500HD (2018).