GMC Sierra 3500HD (2018) is 857 mm (33.74 inch) longer, 479 mm (18.86 inch) higher and has 1451 liters (51.24 ft3) bigger cargo space than Opel Insignia (2020).
Opel Insignia (2020) is 49 mm (1.93 inch) wider and 1057 kg (2,330 lbs) lighter than GMC Sierra 3500HD (2018).
