BMW X6 (2016) is 813 kg (1,792 lbs) lighter than GMC Sierra 3500HD (2019).
GMC Sierra 3500HD (2019) is 1174 mm (46.22 inch) longer, 56 mm (2.20 inch) wider, 288 mm (11.34 inch) higher and has 1258 liters (44.43 ft3) bigger cargo space than BMW X6 (2016).
