Chevrolet Corvette 2014 Owner's Manual page 131

May display when a new
source, radio station, or media type
is selected.
Displays turn-by-turn
navigation information when
Navigation is active and a upcoming
maneuver is pending. It appears
until the maneuver is complete and
then the HUD display returns to the
previous view.
May display when an
incoming call is received from either
OnStar or a Bluetooth connected
phone. It appears momentarily until
the call is answered or ignored.