More Stable Performance: Using better materials, having longer battery life, lighter weight, smaller size, better wear-resistance and water-proof performancePurchase 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 purchaseCompatible Vehicles: Part Number: 20998256 FCC ID: OUC6000066. Replacement for 2007 - 2013 Cadillac. For full complete list, please check our product descriptionBetter Quality Criteria: More simple and quicker button operation, more comprehensive and professional test before shipment. Holding OEM Chip and Program