Citroen C1 (2017) is 633 kg (1,396 lbs) lighter than GMC Sierra 2500HD (2015).
GMC Sierra 2500HD (2015) is 2617 mm (103.03 inch) longer, 425 mm (16.73 inch) wider, 520 mm (20.47 inch) higher and has 1531 liters (54.07 ft3) bigger cargo space than Citroen C1 (2017).