GMC Yukon Denalid Owner's Manual page 273

Here are some ways in which you can help avoid
distraction while driving.
While your vehicle is parked:
•
Familiarize yourself with all of its controls.
•
Familiarize yourself with its operation.
•
Set up your audio system by presetting your
favorite radio stations, setting the tone, and
adjusting the speakers. Then, when driving
conditions permit, you can tune to your favorite
radio stations using the presets and steering
wheel controls if the vehicle has them.
Notice: Before adding any sound equipment
to your vehicle, such as an audio system,
CD player, CB radio, mobile telephone,
or two-way radio, make sure that it can be
added by checking with your dealer. Also,
check federal rules covering mobile radio and
telephone units. If sound equipment can be
added, it is very important to do it properly.
Added sound equipment may interfere with the
operation of your vehicle's engine, radio, or
other systems, and even damage them.
Your vehicle's systems may interfere with the
operation of sound equipment that has
been added.
Notice: The chime signals related to safety
belts, parking brake, and other functions
of your vehicle operate through the
radio/entertainment system. If that equipment
is replaced or additional equipment is added
to your vehicle, the chimes may not work. Make
sure that replacement or additional equipment
is compatible with your vehicle before
installing it. See Accessories and Modifications
on page 421.
Your vehicle may have 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 141 for more information.
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