Welcome to the ultimate upgrade guide for replacing all the OEM halogen bulbs on your 2015-2019 Chevrolet Silverado with LED light bulbs. This guide is only accurate for 2015, 2016, 2017, 2018, 2019 Chevy Silverado 2500 models equipped with OEM halogen bulbs. If your factory OEM bulbs are already LED type, it can't be modified or changed.We dedicated the time and effort to put together all the OEM bulb sizes and LED bulb options in one easy to read location. The information below is free, and for our visitors. This list is an ongoing project and we reserve the right to make changes at anytime. Use the information below at your own risk. We provide zero warranties for the information we compiled. Why are we saying this? We definitely don’t mean to worry you. We say this because sometimes bulb sizes and kits can differ even within the same make, model, and year. The exact production month can sometimes make a difference in bulb sizes used. That makes it nearly impossible for us to be 100% certain the information below will be correct for your Silverado. We just want you to know there’s always that 1 percent chance it’s wrong, for your truck, for whatever rare reason. If you notice any changes that need to be made or additions that need to be included, feel free to let us know. It would be greatly appreciated. We hope you find it useful. Enjoy! 2015-2019 Chevy Silverado 2500 3500 Bulb Size Light Fitment• 2015-2019 Silverado 2500 3500 low forward light uses: H11 bulb• 2015-2019 Silverado 2500 3500 high forward light uses: 9005 bulb• 2015-2019 Silverado 2500 3500 fog light uses: 5202 bulb• 2015-2019 Silverado 2500 3500 front turn signal light uses: 7444 (7443) bulb• 2015-2019 Silverado 2500 3500 rear turn signal/ brake/ tail light uses: 7444 (7443) bulb• 2015-2019 Silverado 2500 3500 front side marker light uses: 194 bulb• 2015-2019 Silverado 2500 3500 rear side marker light uses: 7444 bulb• 2015-2019 Silverado 2500 3500 reverse light uses: 921 bulb• 2015-2019 Silverado 2500 3500 license plate light uses: 2825 bulb• 2015-2019 Silverado 2500 3500 3rd brake light uses: 921 bulb• 2015-2019 Silverado 2500 3500 cargo light uses: 921 bulb• 2015-2019 Silverado 2500 3500 vanity mirror light uses: 6612F (31MM) bulb LED Bulbs Recommendation For 2015-2019 Chevy Silverado 2500 3500 (Click to Order)• 2015-2019 Silverado 2500 3500 low forward light: #N/A• 2015-2019 Silverado 2500 3500 high forward light: #N/A• 2015-2019 Silverado 2500 3500 fog light• 2015-2019 Silverado 2500 3500 front turn signal light• 2015-2019 Silverado 2500 3500 rear turn signal/ brake/ tail light: #N/A• 2015-2019 Silverado 2500 3500 front side marker light• 2015-2019 Silverado 2500 3500 rear side marker light: #N/A• 2015-2019 Silverado 2500 3500 reverse light• 2015-2019 Silverado 2500 3500 license plate light• 2015-2019 Silverado 2500 3500 3rd brake light• 2015-2019 Silverado 2500 3500 cargo light• 2015-2019 Silverado 2500 3500 vanity mirror light: #N/A Contact us to know more information about your vehicle.