GMC Sierra 3500HD (2019) is 1170 mm (46.06 inch) longer, 189 mm (7.44 inch) wider, 477 mm (18.78 inch) higher and has 1278 liters (45.13 ft3) bigger cargo space than Opel Insignia Sports Tourer (2020).
Opel Insignia Sports Tourer (2020) is 1313 kg (2,895 lbs) lighter than GMC Sierra 3500HD (2019).
