I decided to drop onstar and get an extra key with a "secret hiding place" under the car in case of lock out. I ordered the key from parts for a pricey sum and then was supposed to go the shop to program for another pricey sum. I did not have the 30 minutes required at that time and just rode the new key around for the rest of the day. I had tried it at the dealer when I first got it and it did not work. Later that day I discovered the key had programmed itself. Try it if you are going to get an extra key.