The Diode Dynamics 20-21 Sierra 2500/3500 HD LED Sequential Sidemarkers Smoked Set is a high-quality, plug-and-play lighting upgrade designed for GMC Sierra HD models from 2020 and newer. These fully-illuminated sidemarkers feature a dual-lens design for an even glow and are available with optional sequential turn signals that enhance visibility and style. The unique startup sequence provides an animated amber illumination from the center outward, creating a distinctive look each time the lights are activated. Constructed with OEM-grade materials and assembled in the USA, these sidemarkers offer durability, perfect fitment, and upgraded styling to replace factory fender lights seamlessly.
Compatible with 2020+ GMC Sierra 2500 and 3500 HD trucks, these LED sidemarkers are suitable for street use and daily driving. They replace the factory fender lights directly and include a plug-and-play wiring harness for easy installation, utilizing the headlight connector for the sequential turn signal feature. The smoked lens option provides a dark appearance ideal for black or grey vehicles, while the amber and clear options offer DOT/SAE compliance and retroreflector optics. Designed for enhanced visibility and modern styling, these sidemarkers are perfect for upgrading the look and functionality of your Sierra HD.
