Compatible with: Our 6 high mod is deigned for 2015-2020 Chevy Tahoe, 2010-2019 Equinox, 2015-2020 Suburban, 2014-2021 Silverado 1500, 2015-2023 Silverado 2500HD 3500HD, 2015-2020 GMC Yukon, 2010-2017 Terrain, 2015-2020 Yukon XL, 2014-2021 Sierra 1500, 2015-2023 Sierra 2500HD 3500HD, 2016-2019 Buick Envision, enable all the front lamps on after installFunction: All on mod will make your high beams, low beams and fog lights on at the same time when your high beams are on, provide much better visibility at night for your 2020 Silverado 1500 truck, especially when you drive on dark country roads or bad weather, upgrade your headlight lighting with brighter and safer driving experiencePlug and play Installation: Please refer to picture 6, which is a snap to install this 6 hi mod, just insert all the headlights on module between the factory connector and the BCM socket. No need for complicate cutting, modification or programming, keep the OEM appearance, just insert it at your 2015 gmc sierra 1500, you can get rid of the annoying fog light off featureFeature: Once Installed the GM All Lights Mod will turn on the high-beams, low beams and fog Lamps when you turn on your high-beams (GMC and Chevy by default normally turns off the fogs when in high beam, but this module can solve it), low beams and fog lamps will function normally when high beams are not on. Not affect other features of your truck including Intellibeam functionalityWhat you get: 1pcs Headlight All-on Mod for Chevy, GMC and Buick truck, made of heat resistant and flame retardant material, which not produce excess heat, fog lights no more turn off automatically after high beams turn on. Friendly customer service and professional guidance to solve any problems you encounter during installation and use