GMC 2007 Envoy - Manual (Page 238)

Your vehicle has a feature called Retained
Accessory Power (RAP). With RAP, the audio
system can be played even after the ignition is
turned off. See Retained Accessory Power (RAP)
on page 114 for more information.
Setting the Time
The radio may have a button marked with an
H or HR to represent hours and an M or MN
to represent minutes.
Press and hold the hour button until the correct
hour appears on the display. AM or PM will appear
on the display for morning or evening hours.
Press and hold the minute button until the correct
minute appears on the display. The time can
be set with the ignition on or off.
To synchronize the time with an FM station
broadcasting Radio Data System (RDS)
information, press and hold the hour and minute
buttons at the same time until UPDATED and
the clock symbol appear on the display. If the time
is not available from the station, NO UPDAT will
appear on the display.
RDS time is broadcast once a minute. After tuning
to an RDS broadcast station, it may take a few
minutes for the time to update.
Radio with CD (Base)
If your vehicle has the Bose ® audio system, your
vehicle has six Bose ® amplified speakers.
Base Radio Shown, Bose ® Similar
238