GMC 2003 Sierra - Manual (Page 280)

Саге of Your CD and DVD Player
The use of CD lens cleaner discs is not adviaedf due lo
the risk of coniammalmg the lens of the CD oplica
with iLibncams ‘ntomal (o (he CD rnechanism.
Cleaning the Video Screen
Pour some Isopropyl or rubbing glcohol on a dean clolb
and gently wipe the video screen. Do not spray
directly onto the screen and do not press too hard or
too bng ПП Uie video screen.
Fixed Mast Antenna
The fined rf>ast antenna can withstand most car washes
wilhout being damaged. If the masi should ever
become slightly bent, you can siraighien it out by hand.
If the pnasT is badly benu as il might be by vandals,
you should replace it.
Check occasionally to bs sure the mast is shll tightened
to the cowl. If lightening is required, tighten by hand,
then with a wrench one quarter lum.
Satellite Radio Antenna
System
Your XMTM Salellile Radio antenna is located on ihe
root of your vehicle. Keep this antenna clear ol
snow and ice build up for clear radio reception.
DAB Radio Antenna System
Your DAB anienna is located on the roof of your
vehicle. Keep this antenna dear of snow and ice build
up for clear radio rece pi ion
If your vehicle .is purchased in Canada and driven into the
.United Stales ihe DAE radio antenna system will not
function. DAB radio reception isavaliable in Canada only.
Chime Level Adjustment
The radio is ihe vehicle chime producer. To change the
volume level, press and hold pushbutton fi wilb the
ignition on and the radio power off. TTie chime volume
level will change hom ihe nomnall Jevai to loud, and LOUD
v^(H be displayed on the radio. To change back to the
default Or normal setting, press and hold pushbutton 6
agalri. The chime level will change horn Ihe loud level to
normal, and NORMAL will be displayed. Each time Uie
chime volume is changed, ihree chimes will sound as an
example of the new volume selected. Removing the radio
and rKJt repfadrrg it with a factory radio or chime module
will disable vehicle chimofi.
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