GMC Sierra 3500HD (2015) is 787 mm (30.98 inch) longer, 179 mm (7.05 inch) wider, 438 mm (17.24 inch) higher and has 1451 liters (51.24 ft3) bigger cargo space than Opel Insignia Country Tourer (2014).
Opel Insignia Country Tourer (2014) is 1103 kg (2,432 lbs) lighter than GMC Sierra 3500HD (2015).