GM vehicle owners, if you need a replacement key fob, this ACDelco one is the real deal - it's genuine GM original equipment! It's got four buttons: lock, unlock, panic, and remote start (so convenient for warming up your car in winter). The battery comes included, which is nice since you can start using it right away. Now, programming might be something you can do yourself depending on your vehicle - some models let you program it at home, while others might need a quick trip to the dealer or service center. Either way, you're getting the exact same quality and performance as your original remote. It comes with a solid 12-month/12,000-mile warranty for peace of mind. If you've been dealing with a worn-out remote or lost your original, this is definitely the way to go rather than some sketchy aftermarket version. The fit and function are guaranteed to work perfectly with your GM vehicle. Seriously, if you want to avoid compatibility issues, stick with the OEM parts - they're worth the investment!