GMC Sierra 3500HD (2020) is 1069 mm (42.09 inch) longer, 220 mm (8.66 inch) wider, 517 mm (20.35 inch) higher and has 1410 liters (49.79 ft3) bigger cargo space than Opel Insignia Sports Tourer (2020).
Opel Insignia Sports Tourer (2020) is 1169 kg (2,577 lbs) lighter than GMC Sierra 3500HD (2020).