GMC Sierra 3500HD (2016) is 1322 mm (52.05 inch) longer, 175 mm (6.89 inch) wider, 659 mm (25.94 inch) higher and has 1806 liters (63.78 ft3) bigger cargo space than Toyota GR Supra (2020).
Toyota GR Supra (2020) is 1070 kg (2,359 lbs) lighter than GMC Sierra 3500HD (2016).