Ford Flex (2017) is 221 mm (8.70 inch) wider and 687 kg (1,515 lbs) lighter than GMC Sierra 3500HD (2018).
GMC Sierra 3500HD (2018) is 574 mm (22.60 inch) longer, 251 mm (9.88 inch) higher and has 768 liters (27.12 ft3) bigger cargo space than Ford Flex (2017).
