GMC Sierra 2500HD (2020) is 1069 mm (42.09 inch) longer, 222 mm (8.74 inch) wider, 511 mm (20.12 inch) higher and has 1167 liters (41.21 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 2500HD (2020).