Upgrade your GMC Sierra 1500’s front turn signals with these slick Canbus LED switchback bulbs! These are 3157-size bulbs that glow white for daytime running lights and switch to amber when you signal – a modern, bright look. They're designed specifically to work with your Sierra’s Canbus system without causing error messages (ballast included). Super bright at 2000 lumens per bulb, IP67 waterproof, and they last up to 30,000 hours. Fits 1999-2013 GMC Sierra 1500 models, and also fits many other vehicles if they use bulbs like 3457, 4157, 3057, etc. Package includes 2 bulbs. Brand: LASFIT. 1-year warranty. Easy direct replacement – just plug and play. Give your truck a cleaner, brighter lighting upgrade!