Question about 2004 Chevrolet Impala

3 Answers

Unlock antitheft code for 2004 chevy impala

My cd player did not work so I had a new system put in my 2004 impala.
Put my old radio in my sons 2004 chevy trailblazer and it is locked out. Any idea on how to get it unlocked or have the code?

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  • slawler2 May 30, 2008

    I do not understand # 6?. Thank you, I will try it.

  • slawler2 May 30, 2008

    Thank you so much, I will try it today!!!

    thanks again. Sid

  • slawler2 May 30, 2008

    The manual has no instructions for entering a code, its says radio will not work in another vehicle because of antifheft mechanism. there does not seem to be any instructions to input the code, it says to return to dealer. Do you still think it will work in anohter vehicle?

  • slawler2 May 31, 2008

    I tried the steps and cant even get past step one. On the radio display it say "LOCKED" and nothing I do changes it. Step one never changed the display to SEC. I tried it with the car on and off with no results.

    Any recommendation?

    Thanks, Sid

  • moe57 Nov 25, 2008

    i have 02 impala so i relaced the cd player with another one from 2004 chevy impala but i want to unlock the cde

  • depatt Dec 31, 2008

    The problem I have is that even after holding 1&4 and 2&3 it remains "LOCKED"

    Do you have any suggestions

  • Anonymous Mar 16, 2014

    2004 chevy trailblazer door won't lock unlock with key

  • Anonymous Mar 16, 2014

    2004 chevy trailblazer door won't lock or unlock with key

  • Anonymous Mar 18, 2014

    2004 buick centery car was stolen they slamed and broke the ignation andstoled the radioi put a uaed radio out of the junk yeard and a used colem car runs but the dash secuity is on and radio is in antitheft mode need to accept how do i fix

  • Anonymous Mar 18, 2014

    2004 Chevy Impala how to remove the anti theft radio


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Radios in the 2004 Impalas are tied to the vehicle's VIN through the computer, so it may be somewhat difficult to get the code. However, the following steps should work:

1. Press and hold the buttons for presets 1 & 4 (may be 2 & 3). The word "SEC" should show.
2. Press the "MIN" button. "000" should be displayed.
3. Press the "MIN" button again to have the second two numbers appear. Record these numbers.
4. Press the "HR" button for the first two numbers to appear. Record these numbers. -- Note: Your number sequence should be the numbers from the "HR" button followed by the numbers from the "MIN" button.
5. Call 1-800-537-5140. This will get you to the GM unlock code automated line. Ignore the prompt and enter "202108#". Next enter your code (remember, HR then MIN) followed by the * key. For example, 1234*. A 3 or 4 digit code will be given to you. If you get a code such as 0532, drop the zero when entering it into your radio.
6. Enter the code into the radio IAW the applicable manual.

Posted on May 30, 2008

  • David Carruth May 30, 2008

    IAW = In Accordance With; Check the original manual for the radio for exact instructions on entering the code into the radio (they tend to vary).


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You need a tech 2 scanner or equivalent tool to register the radio with the body control module. The radio looks for an ID # and if you have changed it it will lock. These scanners are around $2000.00 and therefor your best bet is the dealer or a competent service center. Dealer charges around $115.00. Good hunting.

Posted on Jan 30, 2009

I can't imagine any reason it wouldn't work in another vehicle. If the manual suggests to return the radio to the dealer, I would assume there is some sort of special equipment needed to clear it to function again.

Posted on May 30, 2008

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