GMC 1995 Suburban Owner's Manual page 183

When a disc is playing, the letters CD and the CD symbol will appear in the
'
display.
EJECT
-
Press EJECT to eject the disc from the player and play the radio.
When the same or a new disc is inserted, the disc will start playing on track
1.
00
Dolby@ Noise Reduction is manufactured under a license from Dolby
Laboratories Licensing Corporation. Dolby@ and the
00
symbol are
trademarks of Dolby Laboratories Licensing Corporation.
THEFTLOCK Theft Deferent Feature
THEFTLOCK is an anti-theft feature for the compact disc player. It can be
used or ignored. If ignored, the system plays normally. If it is used, your
player won't be usable if it is ever stolen, because it will go to LOC mode
any time the battery power
is
removed. After
a loss
of battery power, the
player can'not be turned on unless an unlock code is entered.
The following instructions tell you how to enter a secret code into the
system. If your vehicle loses battery power for any reason, you must unlock
the system with the secret code before the radio will turn on.
To Lock The System:
I . Write down any number from 000 to 999 and keep
it in a safe place.
2. Turn the ignition to ACC or RUN.
3. Turn the radio off.
4. Press the 1 and 4 buttons together. Hold them down until
"-
-
-"
shows
on the display.
You are now ready to enter your secret code. Don't wait more than 15
seconds between any of the following steps. If you do, the radio
automatically returns to time display and you must start the procedure
over at step 4.
5. Press MIN and "000" will appear on the display.
6.
Press the MIN button again to make the last two digits agree with your
code.
7. Press HR to make the first one or two digits agree with your code.
8. Press AM/FM after you have confirmed that the code matches the one
you wrote down. rEP appears in the display, indicating that you need
to
repeat steps 5 through 7.
9. Press AM/FM and this time the display will show SEC.
With the ignition off, the THEFTLOCK indicator will flash.
3-23