REWahoo
Give me a museum and I'll fill it. (Picasso) Give
While you still have both keys, buy a cheap replacement on eBay and get it cut at a hardware store. With the two original keys, you can program the new key using the dog and pony routine yourself and save a bunch.
My new-to-me 2015 car came with three keys, all programmed. Since they are pricey to replace it's great to have a spare.
I also keep a keep a cheap replacement key (with or without the immobilizer chip) that is cut but not programmed. It is only good for unlocking the door in case I lock my keys inside the car....and don't have my backup set.....and can't find my OnStar code.
It is difficult to lock your keys in one of these new 'keyless' cars. It senses that the key is still inside the car somewhere and will not allow you to lock the doors from outside until it can no longer detect a key is inside the vehicle.