Your GM Account is where you can view, manage and change your OnStar or Connected Services* plan and find plans and pricing information tailored to your vehicle. Specifically, you can add to or select a different plan, get your vehicle mobile app information, review diagnostic information,* receive vehicle support, manage maintenance and service,* access an online Owner’s Manual and review helpful how-to content. Log in using your GM Account, OnStar account, vehicle mobile app or My GM Rewards login.