BMW i8 (2019) is 1139 kg (2,511 lbs) lighter than GMC Sierra 3500HD (2016).
GMC Sierra 3500HD (2016) is 1011 mm (39.80 inch) longer, 93 mm (3.66 inch) wider, 658 mm (25.91 inch) higher and has 1837 liters (64.87 ft3) bigger cargo space than BMW i8 (2019).