Buick REGAL 1997 Manual page 188

NOTE: If you allow more than 15 seconds to elapse
between any steps, the radio automatically reverts to
time and you must start the procedure over at Step 4.
1.
2.
3.
4.
5.
6.
7.
8.
9.
Write down any three or four-digit number from
000 to 1999 and keep it in a safe place separate from
the vehicle.
Turn the ignition to ACCESSORY or RUN.
Turn the radio off.
Press the 1 and 4 buttons together. Hold them down
until
---
shows on the display. Next you will use the
secret code number which you have written down.
Press MIN and 000 will appear on the display.
Press MIN again to make the last two digits agree
with your code.
Press HRS to make the first one or two digits agree
with your code.
Press AM-FM after you have confirmed that the
code matches the secret code you have written down.
The display will show REP to let you know that you
need to repeat Steps 5 through 7 to confirm your
secret code.
Press AM-FM and this time the display will show
SEC to let you know that your radio is secure.
Unlocking the Theft-Deterrent Feature After a
Power Loss
Enter your secret code as follows; pause no more than
15 seconds between steps:
1. LOC appears when the ignition is on.
2. Press MIN and 000 will appear on the display.
3. Press MIN again to make the last two digits agree
with your code.
with your code.
code matches the secret code you have written down.
The display will show SEC, indicating the radio is
now operable and secure.
4. Press HRS to make the first one or two digits agree
5. Press AM-FM after you have confirmed that the
If you enter the wrong code eight times, INOP will
appear on the display. You will have to wait an hour
with the ignition on before you can try again. When you
try again, you will only have three more chances
(eight tries per chance) to enter the correct code before
INOP appears.
If you lose or forget your code, contact your dealer.
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