2014 Sierra 2014-2020 Tailgate Specifications Product Name: GMC Sierra Tailgate. Category: GMC Spare Parts Compatible Cars: GMC Sierra models from 2014 to 2020. Brand and Manufacturing: Available as a high-quality aftermarket replacement (Taiwan or equivalent). Condition: New, factory design match. Color: Black / Body Color / Ready to paint as available. Installation: Direct fit on the tailgate without modification.