See also:

Receiving a Call
When an incoming call is received, the audio system mutes and a ring tone is heard in the vehicle. Press to answer the call. Press to ignore a call. ...

Online Owner Center
Buick Owner Center (U.S.) www.buickownercenter.com Information and services customized for your specific vehicle — all in one convenient place. ► Digital owner manual, warranty information, ...

Your Responsibility
Increase the volume of the radio if the OnStar Advisor cannot be heard. If the light next to the OnStar buttons is red, the system may not be functioning properly. Push and request a vehicle diagnos ...