Audi S5 (2016) is 1243 kg (2,740 lbs) lighter than GMC Sierra 2500HD (2014).
GMC Sierra 2500HD (2014) is 997 mm (39.25 inch) longer, 178 mm (7.01 inch) wider, 587 mm (23.11 inch) higher and has 1237 liters (43.68 ft3) bigger cargo space than Audi S5 (2016).
