GMC Sierra 3500HD (2014) is 916 mm (36.06 inch) longer, 176 mm (6.93 inch) wider, 466 mm (18.35 inch) higher and has 1451 liters (51.24 ft3) bigger cargo space than Opel Insignia Country Tourer (2017).
Opel Insignia Country Tourer (2017) is 1019 kg (2,247 lbs) lighter than GMC Sierra 3500HD (2014).