GMC Sierra 3500HD (2020) is 648 mm (25.51 inch) longer, 80 mm (3.15 inch) wider, 95 mm (3.74 inch) higher and has 1010 liters (35.67 ft3) bigger cargo space than Honda Ridgeline (2018).
Honda Ridgeline (2018) is 845 kg (1,863 lbs) lighter than GMC Sierra 3500HD (2020).