Question about 2004 GMC Sierra Denali

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I don't know the code to unlock my radio Is there a book I can purchase to un lock the radio and do they have an 800 number I can call. Pat

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  • BlkLabel Oct 23, 2008

    I removed the radio to retreive stuck CDs, now I get a LOCK message and none of the buttons are working.

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Default codes are supposed to be 0000 1234 9999

Posted on Dec 03, 2008

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Cd Code need code for am fm / CD /cassett player purchased at junk yard out of a 2000 Suburban and putting it into my 2010 Chevy Colorado which has only basic am / fm radio? How do I get past "locked"...


That is a security "feature" on GM radios to deter theft. The following instructions has had sucess with other GM vehicles. If not, only a dealer has the equipment to get past lock screen.

This works on vettes with theftlock. Try it on the tahoe and let us know....




The following procedure will give you a new code that you can use instead of your personal code. Using this new code, you can "unlock" your radio and then "re-lock" it with a new code if you wish. Prerequisites: The radio must be in LOC mode NOT in INOP mode. Let me explain. If you have activated the Theft-Deterrent feature of your radio and loose power, the radio goes
into LOC (theftlock) mode. With the ignition on, you must use the MN and HR buttons to enter you personal code in order to unlock it (The instructions are on page 3-27 in your Y2K Owner's manual). If you fail to enter the correct code eight (8) times, the radio goes into INOP
mode. You have to wait an hour with the ignition on before the radio returns to LOC mode (go for a long drive somewhere).

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.
http://chevroletforum.com/forum/tahoe-suburban-25/help-radio-locked-8220/

Aug 19, 2013 | Chevrolet Cars & Trucks

2 Answers

Just got my car fixed and my radio locked up


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.

Apr 19, 2011 | 1999 Pontiac Grand Prix

1 Answer

Unlock a chevrolet 2000 truck radio


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 in your Owner’s manual. Use the code from STEP 11 instead of your personal code.

Jul 13, 2010 | 2000 Chevrolet Silverado 1500

2 Answers

01 monte carlo rds radio is locked how do i unlock


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.

Jul 07, 2010 | 2001 Chevrolet Monte Carlo

1 Answer

My battery died. when i charged it the radio is locked. how do i get code?


The easy way is to find your hand book in the glove box, the code should be in the book. Next, you will have to take out the radio far enough to see a label and retrieve any numbers on that label, (ie model and serial) numbers. Locate your VIN number at the base of the front window, driver side. If you can't read your VIN off the window, you will have it on your proof of insurance and title as well. Write all these numbers down and call GM -- GMC 1-800-462-8782 -- They will give you the unlock code and give you help with putting the code in the radio. . -- You can always try the last 4 digits of the VIN.

Mar 14, 2010 | 2000 Chevrolet Blazer

3 Answers

2000 chevy s-10 4 digit code for the radio, its locked


this did not work it says code 139010 is invalid to I cant get past step 8 or 9 my number from step 3 is 702 and step 5 is 706 someone please help Im going crazy

Nov 05, 2009 | 1998 Chevrolet S-10 Pickup

2 Answers

1997 bonneville has LOC on the radio, How do I clear it?


if you dont have the code, the radio has to be removed and a gm dealer can get the code.

Oct 04, 2009 | 1997 Pontiac Bonneville

1 Answer

My 1997 honda accord radio


Unlocking Error E3 on Honda AccordI had the same problem after my battery died and I didn't know what "Code" meant so I just pushed buttons until I got Error E3 and it locked up. You need to disconnect one battery terminal for 30 seconds or so, then reconnect, and the radio will say "Code" again. Type in the 5 digit code fount on the Anti-Theft Radio Identification Card (a white credit card size card that comes with the vehicle at the time of purchase). This will unlock the radio and return it to a functional state. It worked for me, so I hope that helps.
Try this
I discovered a very easy and FREE way to fix your radio. Make sure your radio is OFF. Hold down the preset buttons 1 and 6 at the same time. Turn the radio on and your SERIAL NUMBER will appear. 4 numbers first and then 4 more. Write them down (obviously) then call (800) 999-1009. Make sure you have your VIN number handy because they will ask for it. They will ask for your name and approx. milage, and your radio's serial number. They will then give you your radio unlock code--WRITE IT DOWN!
---------------
hope this helps.
thanks.

Sep 09, 2009 | 1997 Honda Accord

1 Answer

How to put code into 1997 lasabre radio, i know the code.


If you are refering to the Theft Lock code, you must first push the right sequence of radio buttons to enter the un lock mode in the radio's computer. Once the radio's Theft Lock Identifier code is displayed, you then enter the un lock code into the radio. Ususally, this is a dealer operation as they have the online program to retrieve the unlock code after they submit your Theft Lock ID code. I'm wondering how you were able to get a unlock code without the dealer's assistance.

Aug 17, 2009 | 1999 Buick LeSabre

2 Answers

I have a 1999 chevy lumina LTZ and i change the battery after that my cd player locked asking me a code so can u please help me how to unlock the code. Thank you


Search the net for "Delco unlock codes" OR "Delco security codes" you should easily find a set of instructions telling you to get a code from your radio and then call an 800 number. Follow these instructions. This will give you the factory unlock code for your stereo. Worked for me and for heaven sakes don't pay anybody for this information - it's free.

Aug 04, 2008 | 1997 Chevrolet Lumina

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