Question about 1998 Chevrolet S-10 Pickup

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Replaced battery. I have the 4-digit radio code but how can I reset and get my radio back?

Posted by gary sheperis on

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sherman north

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  • 52 Answers

Do you know the 4 digit code, if you do then put the code in , follow the directions in your owners manual. If you know it you need to go to a GM dealer to have them to do it and it's not cheap .

Posted on Dec 04, 2020

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stevieger

  • 184 Answers

SOURCE: need radio code vauxhall astra 2000

could you tell me the make of unit in car & could you get the serial no. & part no. for unit it means having to take out thanx.

Posted on Feb 14, 2009

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alicantecoli

Colin Stickland

  • 22485 Answers

SOURCE: 1990 Mercedes Benz 190E Anti Theft Radio cannot be reset

must be doing something wrong?? is it a four digit code?? ,failing which a belson radio that comes with usb play ,sd card play ,radio and cd all in one for about 80€ from the big supermarket .i bought one and its brilliant

Posted on Mar 16, 2009

Anonymous

  • 1 Answer

SOURCE: 2006 gm rds radio is locked need to unlock it

I have a 6 disc AM/FM RDS Radio from a 2003 Chev Suburban that I purchased used and installed it into my 2003 Chev.Silverado and it went into lock up after I Installed it.How do I unlock it

Posted on Apr 14, 2009

No_ky

  • 59 Answers

SOURCE: radio not turning back on after battery died on 99 passat

Any dealer can help you Call them.Now your radio on sefe mode Do not forget to write down the 4 digit code before disconnect the battery

Posted on May 08, 2009

miket756

Michael Thorpe

  • 2702 Answers

SOURCE: My 2006 Honda Pilot had battery disconnected. The

you have enterd the wrong coad too many times now and the radio has "locked you out!" go to honda they can fix it if you can prove its your car,,,not easy with honda

Posted on Oct 17, 2010

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1 Answer

Put new batteries in truck need reset code to work radio


Yes you will need a 4 digit code before it will work, check your vehicle documents to see if it is written down! What make model radio is it?

Aug 06, 2015 | Cars & Trucks

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I disconnected battery and antenna for 2003 acura tl but code wont take


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GM truck 2500 6.0 motor radio locked bought second hand battery went down radio locked


You may have to take your truck to your mechanic and have them reset the computer. If this is the stock radio, it may be backed by the vehicles computer.

May 27, 2011 | 1999 Chevrolet Silverado 2500

1 Answer

How do you unlock the stereo in a Chevy 2002 Silverado?


You will have to access a 6 digit code out of the radio Theftlock system then still go to a dealership to get the 4 digit code that unlocks the radio. Most people put in a radio code (4 digits) when new then forget it years later when the battery is replaced or radio removed. Press preset buttons #2 & #3 at the same time with the key in run position and radio on. A 3 digit code should be displayed (write it down) then immediately press the AM/FM button, another 3 digit code will appear. Take the 6 digit code to a GM dealer. They will call Delcotronics with the generic 6 digit code and get you the master unlock code for your radio. You can dial it in using the scan buttons (best to ask the dealer how, or get them to do it). Once set you can change it again or write down the master unlock code and keep it somewhere for the next time the battery is disconnected. If you can't access the 6 digit code, you will still need to bring it to a dealership and have it unlocked by reprogramming it. It actually is a module on the data line and can create trouble codes and be programmed. It can not be taken from your truck and used in any other vehicle unless programmed to that vehicle.

Feb 11, 2011 | 2002 Chevrolet Silverado 2500HD

2 Answers

Default code to unlock factory radio in a 2000


How to Reset GM Theft lock Radio's
Article Disclaimer: This article is meant to be used by Delco Radio owners to reset there radios. In no way is it meant to be used for any unethical or unlawful ways.

Purpose
The following instructions will allow you to reset any GM (General Motors), Cadillac, Oldsmobile, Buick, Pontiac theft lock radio.

Requirements
The theft lock radio must be in "LOC" mode.

Procedure:
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.

To Read the original article or read similar articles please visit kingbain.com/how-to/unlock-gm-theftlock-radio-s

Good luck (remmeber comment and rated this).

May 05, 2010 | 2000 Chevrolet Silverado

1 Answer

When i try to turn my radio on it says loc hoow do i unlock it?


Does your GM car or truck Radio display LOC and does not turn on? Chevrolet, Buick, Pontiac, GMC, Cadillac, Oldsmobile vehicles used a theft system to lock the radio when power is lost. This system was used from the ealy 1990's to the early 2000's.

Instructions:
  1. If your radio displays the word LOC, you can retrieve a set of factory numbers in the radio that enable you to get a backup unlock code. If the radio says INOP, you will have to leave the key in the "ON" position, or let the car run for at least 1 hour before you attempt any unlock procedure. INOP means a secondary theft lock due to too many false attempts to unlock the radio.
  2. Looking at the face of your GM Delco radio, hold down the preset buttons 1 & 4 OR 2 & 3 (Depending on year and model) for approximately 10 seconds or until a set of 2 or 3 numbers comes up on the display. Write the numbers down.
  3. Next press the AM / FM button. A new set of 3 numbers will now show. Write these numbers down. You will then need to call a 1-800 phone number with these numbers to get the unlock code. There are many sites on the internet that can get it for you- for a small fee. Or, try calling your local GM Dealer and ask for them to do it. Many times they will do it for free. It only takes a minute.
  4. Once you have the unlock code, enter it by pressing the MIN button until the display shows the last 2 digits of the unlock code, then press the HR button until the first 2 numbers or shown. Then press the AM / FM button to enter the code. The radio will now display SEC, and normal function is restored.
Also, its possible that you need RESET your GM Radio; this is the procedure: While performing maintenance on your car, you may disconnect the radio from the battery in your GM vehicle. GM cars contain Delco radios that are protected by Theftlock, which locks the radio after it has been disconnected from a power source. Iit can only be reset and unlocked with a car-specific security code. Identifying the security code for your GM vehicle is the only way to reset the car radio and disable the Theftlock protection device.

Instructions:
  1. Turn on your car. Your Delco radio will show "LOC" in the LED display.
  2. Press and hold down both the second and third preset buttons. Hold these buttons down for at least six seconds.
  3. Write down the two- or three-digit code that appears in the LED display.
  4. Press the AM/FM button on the radio.
  5. Write down the next two- or three-digit code that appears in the LED display. You should be left with either a four- or six-digit number. Turn off your car.
  6. Call the Delco radio automated customer support line at 1-800-537-5140.
  7. Press "1" and then press the pound sign. The automated voice should respond "Invalid code, try again."
  8. Enter the number 139010 into your phone and then press the "*" sign.
  9. Enter the four- or six-digit number you wrote down from Steps 3 and 5, and then press the "*" button.
  10. Write down the four-digit code given by the automated voice.
  11. Turn on your car. Enter the Delco unlock code using the procedure outlined by your GM owner's manual. Normally, the unlock code is entered with the "HR" and "MN" buttons on your radio.
  12. Press the AM/FM button. If you have entered the code correctly, your LED display will read "SEC" and the radio will be unlocked.

Also can check your Does your GM car or truck Radio display LOC and does not turn on? Chevrolet, Buick, Pontiac, GMC, Cadillac, Oldsmobile vehicles used a theft system to lock the radio when power is lost. This system was used from the ealy 1990's to the early 2000's.
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Instructions:
  1. If your radio displays the word LOC, you can retrieve a set of factory numbers in the radio that enable you to get a backup unlock code. If the radio says INOP, you will have to leave the key in the "ON" position, or let the car run for at least 1 hour before you attempt any unlock procedure. INOP means a secondary theft lock due to too many false attempts to unlock the radio.
  2. Looking at the face of your GM Delco radio, hold down the preset buttons 1 & 4 OR 2 & 3 (Depending on year and model) for approximately 10 seconds or until a set of 2 or 3 numbers comes up on the display. Write the numbers down.
  3. Next press the AM / FM button. A new set of 3 numbers will now show. Write these numbers down. You will then need to call a 1-800 phone number with these numbers to get the unlock code. There are many sites on the internet that can get it for you- for a small fee. Or, try calling your local GM Dealer and ask for them to do it. Many times they will do it for free. It only takes a minute.
  4. Once you have the unlock code, enter it by pressing the MIN button until the display shows the last 2 digits of the unlock code, then press the HR button until the first 2 numbers or shown. Then press the AM / FM button to enter the code. The radio will now display SEC, and normal function is restored.
Also, its possible that you need RESET your GM Radio; this is the procedure: While performing maintenance on your car, you may disconnect the radio from the battery in your GM vehicle. GM cars contain Delco radios that are protected by Theftlock, which locks the radio after it has been disconnected from a power source. Iit can only be reset and unlocked with a car-specific security code. Identifying the security code for your GM vehicle is the only way to reset the car radio and disable the Theftlock protection device. jQuery('.intro .thumbnail').each(function(i,e){ jQuery(e).find('img').one('error',function(){ jQuery(e).remove(); }); });
Instructions:
  1. Turn on your car. Your Delco radio will show "LOC" in the LED display.
  2. Press and hold down both the second and third preset buttons. Hold these buttons down for at least six seconds.
  3. Write down the two- or three-digit code that appears in the LED display.
  4. Press the AM/FM button on the radio.
  5. Write down the next two- or three-digit code that appears in the LED display. You should be left with either a four- or six-digit number. Turn off your car.
  6. Call the Delco radio automated customer support line at 1-800-537-5140.
  7. Press "1" and then press the pound sign. The automated voice should respond "Invalid code, try again."
  8. Enter the number 139010 into your phone and then press the "*" sign.
  9. Enter the four- or six-digit number you wrote down from Steps 3 and 5, and then press the "*" button.
  10. Write down the four-digit code given by the automated voice.
  11. Turn on your car. Enter the Delco unlock code using the procedure outlined by your GM owner's manual. Normally, the unlock code is entered with the "HR" and "MN" buttons on your radio.
  12. Press the AM/FM button. If you have entered the code correctly, your LED display will read "SEC" and the radio will be unlocked.

Also can check 1999-Pontiac-Firebird-Owners-Manual (page 163), there are several information about to lock and unlock.


Hope this help (remember comment and rated this).

Apr 06, 2010 | 1999 Pontiac Firebird

1 Answer

1995 silverado need the radio unlock code


If you have lost or never had the code, you can take your truck to a dealership and we retrieve a code from the radio and call GM with it and they give them the code. You should ask them to write it down for you because your radio locks when you disconnect your battery.

Oct 12, 2009 | 1995 Chevrolet C1500

3 Answers

GM Delco Radio unlock code


There are 2 types of GM Theftlock, Theftlock I and Theftlock II.


The Theftlock I is found in pre 2000 vehicles and Theftlock II is

in the latter models.


Theftlock I - Uses a volatile code that is input through the key

pad on the front of the Radio. If the power is lost (dead battery

etc.) the code is gone and must be re-entered for the radio to

work.


If you do not have the code, you can get it by phone, email, etc.

but you will need the 6 digit Radio ID number.


To get that, just turn on the ignition and hold down the 2-3 keys

(sometimes 1-4) and the first 3 digits will appear in the display.

Then hold down the AM/FM button and the last 3 digits will

show up.


With this number you can get the unlock code. This code is

available all over the place for less then $10.00. Just search

on theftlock. Use the HR and MIN buttons to enter the code

and you are in business.


This may sound a bit complicated at first but you can do it

in less then a minute with a little practice.


Theftlock II - Uses an EPROM (erasable/programmable

read only memory) or a PROM (the difference is you can

not alter the prom once it is programmed). In either case

the code is burned in and holds even when the power is lost.


With Theftlock II the radio is married to the vehicle by way

of the VIN. When the vehicle is started the computer

compares the number in the radio with the VIN. If they

match, the radio works, if not the radio displays LOC and

you are finished, there is no easy way around it. The radio

will not work until you make a trip to the dealer.


If the radio has an EPROM the dealer will use something called

a TECH 2 DEVICE to change the VIN stored in the Radio.

The Radio does not need to be removed (for the serial

number or any other nonsense). The technician just plugs

into the computer and resets the VIN in the radio. It can

be done (if you know how) in less then 15 minutes.

I checked around and the going rate is about $60.00

(none of the dealers I contacted would do it for free).

That works out to $240.00 per hour, but still much

cheaper then a new GM Radio.


If the radio has a PROM then the chip must be changed

and that seems to be factory only, in other words a new

radio! The good news is, only a very few of the high end

GM vehicles are equipped with a PROM so it is highly

unlikely that your radio has this anti theft feature.


Good Luck!

Sep 19, 2009 | 2000 Chevrolet Astro

2 Answers

2004 Silverado 2500HD. Airbag/Steering wheel control issue


if you have an anti-theft radio option, when you disconnect the battery you disable the radio. there is a code you need to activate so this does'nt happen, but you must do it before you disconnect the battery. by taking the truck to a dealer, he will use the VIN number and the radio serial number to get the reactivation code from the GM tech service computer bank----------just another example of the useless **** GM puts on their vehicles and costs their customers more money and time.

Aug 11, 2009 | 2001 Chevrolet Silverado

1 Answer

How do you reset the radio for a 2002 GMC 1500?


You will need to contact your local GM dealer with the VIN # proof of ownership & possibly the radio SIN # they will be able to retrieve the code for you if it is the original radio for your truck.
I know it's kind of late now but, If you need to replace your battery & don't have the code I recomend attaching another battery to the battery cables via booster calbes while you install the new battery.

I hope this helps
Farrout!

Mar 17, 2009 | 2002 GMC Sierra 1500

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