Acura RLX (2018) is 815 kg (1,797 lbs) lighter than GMC Sierra 3500HD (2014).
GMC Sierra 3500HD (2014) is 797 mm (31.38 inch) longer, 142 mm (5.59 inch) wider, 513 mm (20.20 inch) higher and has 1569 liters (55.41 ft3) bigger cargo space than Acura RLX (2018).