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 1431 liters (50.54 ft3) bigger cargo space than Opel Insignia Sports Tourer (2020).
Opel Insignia Sports Tourer (2020) is 1103 kg (2,432 lbs) lighter than GMC Sierra 3500HD (2015).