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.

    See also:

    End a Call
    Push . System responds: “Call ended.” ...

    Tire Size
    The following is an example of a typical passenger vehicle tire size. (A) Passenger (P&-Metric) Tire: The United States version of a metric tire sizing system. The letter P as the first chara ...

    Selecting the Right Engine Oil
    Selecting the right engine oil depends on both the proper oil specification and viscosity grade. See Recommended Fluids and Lubricants on page 11‑12. Specification Use and ask for licensed e ...