GMC Sierra 2500HD (2018) is 1322 mm (52.05 inch) longer, 175 mm (6.89 inch) wider, 684 mm (26.93 inch) higher and has 1533 liters (54.14 ft3) bigger cargo space than Toyota GR Supra (2020).
Toyota GR Supra (2020) is 975 kg (2,150 lbs) lighter than GMC Sierra 2500HD (2018).