General Motors has unveiled a redesigned version of its GM Rewards™ loyalty program alongside the introduction of the GM Rewards™ Mastercard®, issued by Barclays US Consumer Bank. The updated rewards system simplifies how customers earn and redeem points, offering greater flexibility and value across GM brands, including Chevrolet, Buick, GMC, and Cadillac. With the new card, users can accumulate rewards from everyday purchases and apply them toward new vehicles, services, parts, accessories, and digital features like OnStar....