Oldsmobile 1995 88 Owner's Manual page 151

Unlocking THEFTLOCK after a power loss:
Enter your secret code as follows; pause no more than
15 seconds between steps.
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0
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LOC will appear when the ignition is on.
Press the MN button and "000" will appear in the
display.
Press MN again to make the last two digits agree
with your code.
Press the HR button to make the first one or two
digits agree with your code.
After you have confirmed that the code in the display
matches the secret code you have written down,
press AM/FM. SEC will appear in the display
indicating that the radio is now operable and secure.
If the code entered to unlock THEFTLOCK is incorrect,
the
radio will remain locked. After eight unsuccessful
attempts to unlock the radio, the display will show InOP
(inoperative). At this point you will need to keep the
ignition on for one hour before you may attempt to enter
another code. After three unsuccessful attempts to
unlock the radio, the display will show InOP
(inoperative) again.
If you forget your code or cannot unlock the radio,
contact your retailer for assistance.
Disabling THEFTLOCK: Enter your secret code as
follows; pause no more than 15 seconds between steps.
1. Turn the ignition to the accessory or run position.
2. Press the PWRNOL button to turn off the radio.
3. Press the 1 and 4 buttons together. Hold them down
until SEC shows in the display.
4. Press the MN button and "000" will appear in the
5. Press MN again to make the last two digits agree
display.
with your code.
6. Press the H R button to make the first one or two
digits agree with your code.
matches the secret code you have written down,
press A " . The display will show
"---"
indicating that the radio is no longer secured.
7. After you have confirmed that the code in the display
If the code entered is incorrect, SEC will appear in the
display. The radio will remain secured until the correct
code is entered.
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