GMC 2003 Sierra - Manual (Page 223)

Audio System(s)
Notice: Sfitore yQU adct any sound equipment to
your vohjcl« ~ Hhe a tap« play^'', CB radio, mobile
telepbone or two-way radio - be sure you can
add what you want. It you can, It's very important to
do It properly. Added sound equipment may
interfere with the operation of your vehicfe's engine,
Delphi Electronics radio or other systems, and
even damage them. Vour vehicle's systems may
interPare with the operation of sound equipment that
has been added improperly,
SOt before adding sound equipment, chock with
your dealer and be sure to check federal rules
covering mobiJe radio and telephone unite.
Your audio system has been designed to operate easily
and to give years of listanlng pleasure. Vou will get the
most enjoyment out of it if you acquaint yourself wilh it
lirsl. Find out what your audio system can
60 and how to
operate all oi ils eontfols to be sure you’re getting the
most oul of the advanced engineering that went Into tt-
Your vehicle may have a feature called Reiained
Accessory Power (RAP). With RAP, you can play your
audio system even after ihe ignllion is turned off.
See “Retained Accessory Power (RAP)" under fgnriidt^
Positions on psge 2-21.
Setting the Time for Radios without
Radio Data Systems (RDS)
Press and hold the HR or MIM arrow for two seconds,
Then press the HR (down) arrow until the coiract hour
appears on itie display. Press and hold the MIN (up)
arrow unbi the correct minuto appears on Lho display. The
Time may be set with the ignition on or off
Setting the Time for Radios with
Radio Data Systems (RDS)
Your radio may have a hulton madted with an H or HR to
represent hours and an M orMN to represent minutes.
Press and hold the heurbutlon until the corred hour
appears on the display. Press and hold the rsinute
button until Ihe corred min ufe appears on the display.
The time may be set with ihe Ignition on or oif.
To synchronise the time with an FM station broadcasting
Radio Data System (RDS) informahon, press and
hofd the hour and minule buttons at the same time until
RDS TIME appears on the display. To accept this
time, press snd hold ths hour and minute buftons, st the
sarme lime, for another 2 seconds. If the time is not
available from the station, NO UPDAT will appear on the
display insteaol.
RDS tíme is broadcast once a minule. Once you have
luned lo an RDS broadcast slatron, it may lake a
few minutes for your lime to update.
3r^fi