https://www.chevroletonlineparts.com/oe ... r-13508767
https://www.chevroletonlineparts.com/oe ... NCZyPTU%3D
I laid my spare key fob on top of my car(Dumb Move) while rummaging through my glove box. later i took off driving with my normal key in my pocket. Good by "Key Fob" on the roof. I got a new fob from the attached website and i programed the fobs myself using the instructions in the manual. I think they made it a long enduring process so you don't have car thieves just coming up and re-programming fobs to steal cars. One thing to note is , once you start the process "Don't open the door" . I did and had to start all over . it took me twice as long then normal. I asked the "Parts department" to cut the key portion of the fob when i was in for the infotainment update. They did it for No charge (from my Vin #) since i was a customer.