Citroen C1 (2017) is 1813 kg (3,997 lbs) lighter than GMC Sierra 2500HD (2020).
GMC Sierra 2500HD (2020) is 2516 mm (99.06 inch) longer, 458 mm (18.03 inch) wider, 556 mm (21.89 inch) higher and has 1531 liters (54.07 ft3) bigger cargo space than Citroen C1 (2017).