Connect the Sierra 2500 HD 3500 HD side marker lamps to front/rear side marker lamps to create brighter LED signals feature! This will enhance your Sierra's luxurious presence by adding additional safety and visibility features.The LED lights are made to fit for the 2020-2022 GMC Sierra 2500 HD/3500 HD. Upgrading your 2500HD/3500HD side signal Lights for a modern LED appearance as well as enhanced safety visibility, and cool fashion stylelook! Description of these Sierra AT4 SLE SLT Denali side marker Light Assemblies lamp: Compatible with: For 2020 GMC Sierra 2500 HD For 2021 GMC Sierra 2500 HD For 2022 GMC Sierra 2500 HD For 2020 GMC Sierra 3500 HD For 2021 GMC Sierra 3500 HD For 2022 GMC Sierra 3500 HD Features: Power: 18W Voltage: DC12-24V Lens Color: Smoked Lens Waterproof grade: IP67 waterproof. Light color: White LED Lighting for front marker lights and rear marker lights. The lens is made of anti-scratch PC plastic, which prevents the lens from being faded with long-time exposure Full LED Wheel Side Marker Lamp Housing