GMC Sierra 2018 Owner's Manual page 197

196 Infotainment System
Refer to the table for the
classification items related to the
search function provided by the
iPod/iPhone.
USB Player
Playing Music from a USB Device
Connect the USB device to the
USB port.
Play will start automatically after
the system has finished reading
the USB device.
If a non-readable USB device is
connected, an error message
displays and the system will
switch to the previous audio
function.
If the USB device is already
connected:
Press .
Touch AUDIO.
Touch Source.
Touch USB.
To stop the USB device and select
another media source, touch
Source, then select the other
source.
To remove the USB device, select
another function, then remove the
USB device.
Pause
Touch to pause.
Touch to resume.
Changing to Next/Previous Files
Touch to change to the
next file.
Touch within five seconds of
the playback time to play the
previous file.
Returning to the Beginning of the
Current File
Touch after five seconds of the
playback time.
Scanning Forward or Backward
Touch and hold or
playback to rewind or fast forward.
Release the button to resume
playback at normal speed.
Playing a File Randomly
Z
Touch during playback.
ON: Plays all files randomly.
OFF: Returns to normal
playback.
Using the USB Music Menu
Touch Menu during playback.
during