【COMPATIBILITY】2014-2018 for GMC Sierra & for Chevy Silverado 1500, 2015-2018 for GMC Sierra & for Chevy Silverado 2500HD 3500HD. Replace Part Number: 23509162, 20979071 【DURABLE & WATERPROOF MATERIAL】The third brake light is made of durable Polycarbonate smoke lens, which offer superior UV protection, high impact resistance, and working perfectly in any bad weather 【SUPER BRIGHT】The cargo light provides more conspicuous and brighter light giving brake warning to other drivers to ensure your safe driving. Stylish design brings a different appearance to vehicle that great for show use 【EASY INSTALLATION】Plug and play design. The high mount stop light is no more drilling needed. For a better fit, it is recommended to use factory screws 【EXCELLENT AFTER-SALES】24 hour friendly customer service. Our products are DOT/SAE certified. Fits for GMC Sierra & for Chevy Silverado 1500 2014-2018, Fits for GMC Sierra & for Chevy Silverado 2500HD 3500HD 2015-2018.