GMC 2012 Sierra Denali Owner's Manual page 217

For optimal sound quality, increase
the portable audio device's volume
to the loudest level.
It is always best to power the
portable audio device through its
own battery while playing.
O
(Power/Volume): Turn clockwise
or counterclockwise to increase or
decrease the volume of the portable
player. Additional volume
adjustments might have to be made
from the portable device if the
volume is not loud or soft enough.
BAND: Press to listen to the radio
when a portable audio device is
playing. The portable audio device
continues playing.
CD/AUX (CD/Auxiliary): Press to
play a CD when a portable audio
device is playing. Press again and
the system begins playing audio
from the connected portable audio
player. If a portable audio player is
not connected, No Input Device
Found displays.
DVD/CD AUX (DVD/CD/
Auxiliary): Press to cycle through
DVD, CD, or Auxiliary when
listening to the radio. The DVD/CD
text tab and a message showing
track or chapter number will display
when a disc is in either slot. Press
again and the system automatically
searches for an auxiliary input
device, such as a portable audio
player. If a portable audio player is
not connected, No Aux Input
Device displays. If a disc is in both
the DVD slot and the CD slot, the
DVD/CD AUX button cycles
between the two sources and does
not indicate No Aux Input Device.
If a front auxiliary device is
connected, the DVD/CD AUX button
cycles through all available options,
such as: DVD slot, CD slot, front
auxiliary, and rear auxiliary (if
available). See Using the Auxiliary
Input Jack in this section, or Audio/
Video (A/V) Jacks under Rear Seat
Entertainment (RSE) System on
page 7 39 for more information.
Infotainment System
Using the USB Port
Radios with a USB port can control
a USB storage device or an iPod
using the radio buttons and knobs.
See Playing an MP3 in CD Player
on page 7 16 or CD/DVD Player on
page 7 23 for information about how
to connect and control a USB
storage device or an iPod.
USB Support
The USB connector is located on
the instrument panel or in the center
console, and uses the USB 2.0
standard.
USB Supported Devices
USB flash drive
Portable USB hard drive
Fifth generation or later iPod
iPod nano
iPod touch
iPod classic
Not all iPods and USB drives are
compatible with the USB port.
7-35
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