Buick Regal Sportback (2018) is 248 kg (547 lbs) lighter than GMC Sierra 1500 (2014).
GMC Sierra 1500 (2014) is 321 mm (12.64 inch) longer, 170 mm (6.69 inch) wider, 412 mm (16.22 inch) higher and has 1258 liters (44.43 ft3) bigger cargo space than Buick Regal Sportback (2018).