Received an email today from My GM Loyalty Rewards/My Cadillac Rewards:
Your December My Cadillac Rewards contains a special gift
You deserve a little something for yourself this holiday season. Please choose a complimentary $10 gift card+ by 12/31/18.
You can choose from Starbucks, Barnes & Noble, Apple iTunes/App Store, and GAP
Be on the lookout in your inbox for this special offer. The email was branded for My Cadillac Rewards, but came from My GM Loyalty Rewards so maybe other GM members will receive the offer as well? YMMV