GMC Sierra 2015 Owner's Manual page 226

Route Preview
Repeat
When the system is downloading a
route, the only option available is
Cancel Route. Once the route is
downloaded, the additional list items
display.
My Destination
If My Destination is selected, a
special version of the Maneuver
View displays. The Destination
Address is shown in the Street
Name field and the total distance to
the destination is shown in the
Distance to Maneuver View. Press
the button below the DONE screen
button to return to the
Maneuver View.
Route Preview
If Route Preview is selected, a
special version of the Maneuver
View displays.
Press the button below the
NEXT screen button to display
the next maneuver information,
including distance between it
and the previous maneuver.
Press the button below the
PREV screen button to display
the previous maneuver
information, including distance
between it and the previous
maneuver.
Infotainment System
While on the current maneuver,
the PREV screen button is
hidden. If on the last maneuver,
the NEXT screen button is
hidden.
Press the button below the
DONE screen button to return to
the Maneuver View.
Repeat
Press the button below the REPEAT
screen button to go back to the
Maneuver View. The audible
maneuver prompt is repeated.
Canceling a Turn-by-Turn Route
Select Cancel Route, then select
Yes. A screen displays to confirm
the cancellation.
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