COMPATIBILITY - Fits 2014-2018 Chevy Silverado 1500, 2015-2019 Chevy Silverado 2500HD/3500HD, 2014-2018 GMC Sierra 1500, 2015-2019 GMC Sierra 2500HD/3500HD, 2019 Chevy Silverado 1500 Legacy, and 2019 GMC Sierra 1500 Limited..FUNCTIONS - SIZIOM tow mirrors offer a range of functions, including switchback dynamic & arrow turn signal lights, backup lamps, running lights, heater defrost, temp sensor on the passenger side. Power-adjustable flat glass, manual-adjustable convex glass and manual telescoping & folding..NOTE - The towing mirror is only applicable to the vehicles listed above. To avoid any inconvenience, kindly confirm that this product is suitable for your vehicle and meets your needs before placing an order..DURABILITY & RELIABILITY - Our Silverado / Sierra towing mirrors are made of high-quality ABS plastic with a durable painted white shell. The reasonable design provides a better and wider angle of rear view, which improves visibility and reduces blind spots..AFTER-SALES SERVICE - We offer the most sincere and high-quality after-sales service for our customers. If you have any questions, please feel free to contact us. Upgrade your Silverado or Sierra today with SIZIOM towing mirrors!