Question about 1999 Chevrolet Cavalier

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Battery change locked of radio?

My dad just changed the battery in my '99 cavalier Z24 and now the radio won't work. it says "LOC" on it and we have no idea how to reset it. also my brake lights keeps going out. we replaced the bulbs and checked the fuses and we don't know what else to do

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  • yadayada
    yadayada May 11, 2010

    DO YOU HAVE THE RADIO'S UNIQUE CODE?

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You have to get an code,if this is an stock radio,call the dealership with your vin number,they will give you the code.

Posted on Jun 23, 2009

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1 Answer

99 chevy cavalier z24 2.4L 153 plus miles Vehicle


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I changed the battery in my 2000 corvette and now the radio does not work.


This is a problem with the Theft-Loc system. I believe you will have to take it to the dealer to have the radio unlocked. I found this procedure on the web, but I don't know if it will work. Good luck.

1. Turn the ignition ON (The radio should display "LOC")

2. Hold down the Radio Presets 2 and 3 buttons for six seconds

3. The radio display changes from LOC to a three-digit number. Write this number down. You now have fifteen seconds to complete the next step.

4. Press the AM/FM button

5. The radio display changes to another three-digit number. Write this number to the right of the first one.

6. You now have a six-digit number, the first three digits are from STEP 03 and the last three digits are form STEP 05

7. Call 1-800-537-5140

8. Press 1 then # (pound). You'll hear "Invalid Code, try again"

9. Press 139010 or 106010 or 206010 or 202107 then # (pound). You will be asked to enter your four or six digit code followed by *

10. Enter the number from STEP 6 then *

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.

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1 Answer

Radio is locked.need a code for 99 chevy cavalier


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My dealer wants $85 for the code. Another dealer - 2 hrs away - wants $50. This looks more like a GM money-maker than a security feature.

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1 Answer

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