Purchase Instructions: This is a brand-new, unprogrammed key, requiring programming by a locksmith.Make sure to verify the appearance of your original key, your vehicle's model and year, along with the FCC ID and part number on the back of your original key to ensure they match what's described on our websiteProgramming: Please connect with your local dealer to look into compatibility and programming concerns. Please confirm with your local dealer or locksmith that this remote can be programmed for your vehicle before making a purchaseBetter Quality Criteria: More simple and quicker button operation, more comprehensive and professional test before shipment. Holding OEM Chip and ProgramCompatible Vehicles: Part Number: 13508398 FCC ID: HYQ1EA. Replacement for 2019 - 2021 Chevrolet GMC. For full complete list, please check our product descriptionMore Stable Performance: Using better materials, having longer battery life, lighter weight, smaller size, better wear-resistance and water-proof performance