GMC Sierra 2500HD (2014) is 802 mm (31.57 inch) longer, 176 mm (6.93 inch) wider, 456 mm (17.95 inch) higher and has 1178 liters (41.60 ft3) bigger cargo space than Opel Insignia Country Tourer (2017).
Opel Insignia Country Tourer (2017) is 1318 kg (2,906 lbs) lighter than GMC Sierra 2500HD (2014).