Geo 1995 Prizm Owner's Manual page 122

Theft-Deterrent Feature
The theft-deterrent feature for the AM-FM stereo with
cassette tape and compact disc player can be used or
ignored. If ignored, the system plays normally. If
it
is
used, your system won't be usable if it's ever stolen
because LOC will appear on the display when battery
power is lost.
Setting Your Security Code
The following instructions will tell you how to enter a
security code into the system. If your vehicle loses
battery power for any reason, you must enter the
security code again before the system will turn on.
Write down any four-digit number and keep it in a
safe place.
Turn the ignition switch to the ACC or ON position.
Turn the audio system off.
Press the 1 and 4 buttons together. Hold them down until
'(----
"
shows on the display.
I
You are now ready to enter your security code. Don't
wait more than 15 seconds between steps.
Press SEEK 4 b andor TUNE
4 b
and "0000" will
appear on the display.
Press SEEK 4 and hold it until the first digit of your
code appears. Release the button.
Press SEEK b and hold it until the second digit of your
code appears. Release the button.
Press TUNE 4 and hold it until the third digit of your
code appears. Release the button.
Press TUNE b and hold it until the fourth digit of your
code appears. Release the button.
Press AM-FM after you have checked that the code you
entered is the one you wrote down. "rEP" will appear on
the display, which means you need to repeat steps 5
through 9.
Press AM-FM again and the display will now show
SEC.
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