GMC Sierra 2500HD (2018) is 787 mm (30.98 inch) longer, 179 mm (7.05 inch) wider, 463 mm (18.23 inch) higher and has 1178 liters (41.60 ft3) bigger cargo space than Opel Insignia Country Tourer (2020).
Opel Insignia Country Tourer (2020) is 1004 kg (2,213 lbs) lighter than GMC Sierra 2500HD (2018).