See also:

Turn and Lane-Change Signals
An arrow on the instrument panel cluster will flash in the direction of the turn or lane change. Move the lever all the way up or down to signal a turn. Raise or lower the lever until the arrow ...

Horn
Press near or on the horn symbols on the steering wheel pad to sound the horn. ...

OnStar®
For vehicles with an active OnStar subscription, OnStar uses several innovative technologies and live Advisors to provide a wide range of safety, security, navigation, diagnostics, and calling servi ...