Unable to Connect to OnStar Message

GMC Sierra / GMC Sierra Owners Manuals / OnStar / OnStar Additional Information / Unable to Connect to OnStar Message

If there is limited cellular coverage or the cellular network has reached maximum capacity, this message may come on. Push Vehicle and Power Issues to try the call again or try again after driving a few miles into another cellular area.

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    Viscosity Grade
    SAE 5W-30 is the best viscosity grade for the vehicle. Do not use other viscosity grade oils such as SAE 10W-30, 10W-40, or 20W-50. If in an area of extreme cold, where the temperature falls below &# ...

    Dome Lamp Override
    The dome lamp override button is next to the exterior lamps control. DOME OFF: Press the top of the button in and the dome lamps remain off when a door is opened. An indicator light on the button ...

    Trip/Fuel Menu Items
    (Trip/Fuel): Press this button to scroll through the following menu items: ODOMETER Press the trip/fuel button until ODOMETER displays. This display shows the distance the vehicle has been driven i ...