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This code needs to be requested from GM by a GM technician. They will call GM with your vehicle identification number(VIN) and get the code. Then they will use their computer scan tool to enter the code and "unlock" your radio. In the future, you risk "locking" your radio anytime that you unhook the radio from the vehicle or unhook the battery (such as replacing the battery). Most parts stores sell a memory saver for under $10. This is a unit that has a plug on one end to plug into your cigarette lighter socket, and a 9volt battery on the other end. It provides enough power to keep your radio "safe" and keep the car's computer memory "alive". Good investment, even if you only need to use it once or twice.

An alternative:

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.

Dealership Codes

  • 139010
  • 106010
  • 206010
  • 202107

Troubleshooting

If you fail to enter the correct code eight times, the radio goes into INOP mode. You have to wait an hour with the ignition on before the radio returns to LOC mode.

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Q: Code to unlock radio for Chevy Blazer?
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