Money GM charging new buyers $1,500 for ‘optional’ OnStar plan even if they never plan to use it August 10, 2022 Jamie L. LaReau, Detroit Free Press Comments Off on GM charging new buyers $1,500 for ‘optional’ OnStar plan even if they never plan to use it GM labels it as an "option," but its new cars now include a $1,500 add-on for a subscription service whether a customer wants it or not.