GMC 2010 Sierra 1500 Crew Cab Owner's Manual page 309

Determine which radio the vehicle has and read the
following pages to become familiar with its features.
Taking your eyes off the road for extended periods
could cause a crash resulting in injury or death to
you or others. Do not give extended attention to
entertainment tasks while driving.
This system provides access to many audio and non
audio listings.
To minimize taking your eyes off the road while driving,
do the following while the vehicle is parked:
Become familiar with the operation and controls of
the audio system.
Set up the tone, speaker adjustments, and preset
radio stations.
For more information, see
.
The vehicle has Retained Accessory Power (RAP). With
RAP, the audio system can be played even after the
ignition is turned off. See
for more information.
4-85