United States, May 20 -- General Motors is redesigning its GM Rewards (TM) loyalty program and announcing the launch of the GM Rewards (TM) Mastercard(R) from Barclays US Consumer Bank. The revamped loyalty program is simpler, and the new card provides customers more ways to earn and redeem GM Rewards points across GM brands for new vehicles, services, parts and accessories.GM Rewards members can also earn and redeem GM Rewards points towards digital services like most OnStar plans and Super Cruise1, the hands-free driver assistance technology which can be used on about 750,000 miles of compatible roads across the U.S. and Canada.In addition, customers of GM Financial will be able to redeem GM Rewards points towards an account balance. And ...