Introducing the Morimoto XB LED Tail Lights for GMC Sierra trucks (2014-2018)! Say goodbye to dull, outdated tail lights and embrace the ultimate upgrade. These lights are the game-changer every Sierra owner has been waiting for. Experience unmatched style with modern 3D light blades and two rows of TIR-Optics that serve as both brake lights and turn signals, ensuring maximum visibility day and night. But that's not all – the Morimoto XB tail lights come standard with powerful LED reverse lights. Plus, the innovative Backup-Boost system lets you easily add an optional LED Reverse Light Bar for an extra 2,700 lumens of controlled light when backing up. Safety is paramount, and Morimoto knows it. These tail lights comply with all DOT and SAE regulations for rear-facing lamps, ensuring you're both stylish and road-legal. And with a choice of smoked or red outer lenses, you can tailor the look to your preference. Don't compromise on style or safety – upgrade to Morimoto XB LED Tail Lights and light up the road with confidence!