Buick 1993 LeSabre Owner's Manual page 142

Step
1.
Write down
any
6-digit number and keep it in a
safe place.
Step 2. Turn the ignition to the ACC or RUN position.
Step 3. Press PWR to turn the radio off.
Step 4. Press presets 1 and
4
buttons together. Hold
them until
"-
-
-"
shows on the display (at least 5
seconds).
You
are now ready to enter your secret code. If you
pause more than
15
seconds between steps you may
have to start over.
Step
5.
Press SET and "000" will appear on the display.
Step 6. Press SEEK or
4 and hold it until the first
digit of your code appears.
Step 7. Rotate the tune knob right or left to make the
next two numbers agree with your code.
Step 8.
Press AM-FM knob and "000" will appear. Now
you are ready to enter the second three digits of the code
according to Step 6 and 7.
Step 9. Press the AM-FM knob. The display will show
"rEF'" , and then "000" will appear indicating that some
steps are to be repeated for verification.
Step 10. Repeat steps 6, 7, and 8.
Step 11. Press the AM-FM knob. If
the display
shows
"SEC" , the verification process was successful and the
system is SECURE. If the display shows
"-
- -", the
verification steps were not successful and the entire
sequence must be started again.
To Unlock The System After a Power Loss
When battery power is reapplied to a secured radio, the
radio won't turn
on and "LOC" will appear in the
display.
Enter your secret code as follows; pause
no
more than
15 seconds between steps.
1.
2.
3.
4.
Turn the ignition on (Radio off.)
Press the SET button. The display will show "000".
Enter the six digits of the code following steps 6 thru
9 above. The display will show the number as
entered.
Press the AM/FM button and the time appears -
indicating that the disabling sequence was
successful. If the display indicates "SEC", the
number did not match and the unit is still secured.
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