Chevrolet Tahoe (2018) is 13 mm (0.51 inch) wider and 23 mm (0.91 inch) higher than GMC Sierra 1500 (2020).
GMC Sierra 1500 (2020) is 42 mm (1.65 inch) longer, 551 kg (1,215 lbs) lighter and has 264 liters (9.32 ft3) bigger cargo space than Chevrolet Tahoe (2018).