Verify Minutes and Expiration

Push OnStar Mobile App and say “minutes” then “verify” to check how many minutes remain and their expiration date.

    See also:

    Engine Oil
    To ensure proper engine performance and long life, careful attention must be paid to engine oil. Following these simple, but important steps will help protect your investment: • Always use engine ...

    Features
    The Denali comes with a long list of standard equipment to please passengers: Heated leather front seats, a Bose stereo with a six-disc CD changer, XM Satellite Radio and a three-zone air-conditio ...

    Trip/Fuel Menu Items (with DIC Buttons)
    (Trip/Fuel): Press this button to scroll through the following menu items: ...