Ford Mustang (2015) is 792 kg (1,746 lbs) lighter than GMC Sierra 2500HD (2018).
GMC Sierra 2500HD (2018) is 916 mm (36.06 inch) longer, 119 mm (4.69 inch) wider, 582 mm (22.91 inch) higher and has 1394 liters (49.23 ft3) bigger cargo space than Ford Mustang (2015).