That was my plan, to use one as a valet key I could hide in a magnetic box just in case I locked the key fob in the car along with my cell phone (couldn't call On Star.) I have seen the key blanks for about $15 on ebay. Expensive for a key blank but I don't know how much programing would cost. Just getting into the vehicle in an emergency would be my goal. Thanks for all the responses.VB - LTZ said:I simply use this key for a back up in the case I locked the keys in the vehicle because I no longer have On Star on the vehicle.