Can someone please help me???
I disconnected my positive battery terminal to clean it and in doing so I realized later my radio went into loc mode. I understand there is a code to get it back to normal operation. I bought the car used in Mass. and now live in Florida. I do not know if the original owner ever put in an original code and I do not have a manual. I have a 98. Please help!!!

 

Here is the file I mentioned in the private e-mail to you. I decided to post it for those who might need in the future:

Procedure:
01. Turn the ignition ON (The radio displays LOC)
02. Hold down the Radio Presets 2 and 3 buttons for six seconds 03. The
radio display changes from LOC to a three-digit number. Write this number
down. Don't take forever, fifteen seconds max before the next step. 04.
Press the AM/FM button 05. The radio display changes to another three-digit
number. Write this number to the right of the first one. 06. You now have a
six-digit number, the first three digits are from STEP 03 and the last three
digits are form STEP 05 07. Call 1 800 537 5140 08. Press 1 then # (pound).
You'll hear "Invalid Code, try again" 09. Press 139010 then # (pound). You
will be asked to enter your four or six digit code followed by * (start) 10.
Enter the number from STEP 6 then * (star) 11. Listen to the four-digit
number and write it down. It will be repeated twice 12. Turn the ignition ON
(The radio displays LOC) 13. Use the MN and HR buttons to enter the code
from STEP 11 14. Press the AM/FM button. The radio display changes to SEC

Your radio is now "un-locked" and usable. The Theft-Deterrent feature is
STILL active! If you want to disable it, use the instruction on page 3-27 in
your Y2K Owner's manual. Use the code from STEP 11 instead of your personal
code.

Note: This tip originated from LOTZAHP, Austin TX (credit must be given
where credit is due). I verified it on an Y2K C5 with a locked radio - mine.

 

This is the same procedure GM dealers use. They charge 1/2 hour for this service.

 

Nice write-up

 

Definitely one for the SAVE file, Thanks JH.

 

The procedure is in the forum C5 Tech Tips

( Dan)

 

When working on the bat always disconnect the negative terminal first.