Question about 1999 Oldsmobile Alero

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Theftlock radio code

I need a code for a theft lock radio in my alero

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  • cowboy_kid20 May 22, 2009

    that sucks cause the dealer wants to charg me 50 bucks to fix it

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  • 245 Answers

You have to get this from the dealer no other way

Posted on May 22, 2009

  • jon fuller May 22, 2009

    or you can replace it with an aftermarket. but if you do get it from the dealer. cannot stress this enough WRITE IT DOWN DO NOT LOSE IT AGAIN.

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1 Answer

What is the security code?


Your SECURITY light lit on the instrument cluster ? or you disconnected the battery an now the radio is locked ?
The theft deterrent system on this vehicle is comprised of the vehicle theft deterrent (VTD) system. VTD prevents drive away theft by preventing the vehicle from starting.
SECURITY Indicator The SECURITY indicator on the instrument cluster is controlled by the VTD system. The SECURITY indicator is located inside the instrument cluster. The SECURITY indicator is controlled by the body control module through the class 2 data line. The VTD system contained in the BCM commands the instrument cluster to control the SECURITY indicator only when the ignition switch is ON. The VTD system uses the indicator as a malfunction indicator.
Theft Deterrent
The "Theftlock" theft deterrent system is a feature on all base and uplevel radios. There is no need to program a security code into the radio as in past model years. The theft deterrent system now utilizes class 2 serial data to determine if the radio is in the appropriate vehicle. Each time the radio receives the "run" power mode message, it compares the VIN information it has stored to the VIN information received from a module on the class 2 serial data circuit responsible for transmitting that information. If a mis-match occurs, the radio display will indicate to the user the radio is locked. Once this takes place, a DTC will set, the radio will not respond to any button presses and become inoperative. The two scenarios able to cause this condition are:
?€¢
A radio is installed from another vehicle.


?€¢
A module which communicates on the class 2 serial data circuit which supplies VIN information to the radio is replaced and not properly setup with the correct VIN information for that vehicle.

The only way to unlock the radio is by using a scan tool. Always refer to the table in this section to diagnose the "Theftlock" DTC for further information.
So what problem are you having ?

May 01, 2016 | 2004 Pontiac Grand Am

2 Answers

How can I unlock the theft lock?


try to do reset procedures.
1. remove positive power cable from battery
2. wait for 5 minutes
3.while waiting for 5 minutes switch on all possible accessory,like ignition,internal lighting,headlights,hazzard,A/C,open all door,step on brake pedals
4. after doing procedure #3 ,switch off all the above mentioned accessories
5.install back the positive power cable to your battery
hopefully this should reset your anit theft system to normal

Sep 05, 2015 | 2006 Pontiac Montana SV6

1 Answer

Theftlock activation is disabling start up of engine, how do i fix


if you can start on a jump from another battery ( starting normal way with the ignition) then it would be the battery you have on the car at fault. immobilizer. theftlock would stop you starting it any way you try to. that is what they do .

Jan 12, 2014 | 2001 Pontiac Sunfire

1 Answer

Gm delco theftlock radio wont turn on?


You have to enter the theft code which was set into the radio. The owners manual will tell you how AS LONG AS YOU HAVE THE CODE. If you don't have the code, any GM dealer will help you out and call in to get your code. They will want to make sure you own the vehicle.

Jul 22, 2012 | Cars & Trucks

1 Answer

2004 GRAND PRIX RADIO THEFTLOCK REMOVE


You need to enter the unique code for your radio that was given to the orig owner. If you do not have that you will need to see the GM dealer.

Jun 25, 2012 | Cars & Trucks

2 Answers

I took a stock RDS radio out of my 98 catera and put it in my 97 catera... it reads "Locked-THEFTLOCK active" on the screen. Please help


If you never entered a lockout code for your radio, youll have to take it to the dealer to get them to clear it out.

Jan 04, 2011 | 1997 Cadillac Catera

1 Answer

I NEED TO UNLOCK MY STERO IN A 2004 TAHOE


There is no actual "security code" in the radio as in past model years. The newer theft deterrent system utilizes the class 2 serial data to determine if the radio is in the appropriate vehicle...in other words it compares the VIN it has stored in it's memory with the VIN of the other modules (body control and PCM) in the vehicle to "check" to see that it's in the correct vehicle.

Each time the radio receives the "run" power mode message, it compares the VIN information it has stored to the VIN information received from a module on the class 2 serial data circuit responsible for transmitting that information. If a mis-match occurs, the radio display will indicate to the user the radio is locked. Once this takes place the radio will not respond to any buttons/commands and becomes inoperative. But the dealer can reestablish the radio into a different vehicle with a scanner.

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 later models.


Theftlock I - Uses a volatile user settable 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. But with the correct procedure the owner can unlock it.

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 in the body control module. 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.

The dealer will use a TECH 2 scanner 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.

Thank you for using fixya and good luck. you might get luck by removing the fuse toy our radio for 5 min and reinstalling it, this will reset the radio to default and all you need to do is reset the clock and radio presets.

Jun 15, 2010 | 2004 Chevrolet Tahoe

2 Answers

Radio Wont Play after I replaced Battery!


thats because its a key code security device once you disconnect its power source the radio will automatically lock itself to prevent theft but you can take it to a shop that sells radios and they can reset it for you but its impossible to diy because you need a computer to programme the microchip so take it to a shop m8 otherwise it wont work mine did the same hope i helped :)

Oct 25, 2009 | 1994 Oldsmobile Cutlass Supreme

1 Answer

How do i unlock my theft lock?


leave it in the on position 4 ten mins, security lite will go out, then turn back to off position than start the car, i just had the same problem with my alero.

Nov 22, 2008 | 2001 Oldsmobile Alero

3 Answers

Radio Unlock Code


if you bought the car new then there should be writen in the manual the code for the theft lock system on the radio. if pre-owned then it might ,might not be in there. or if you dont have one at all. go to your nearest GM dealer and have them fix it by finding the code. make sure to have them write it down for you incase this happens again.

Jun 24, 2008 | 1997 Oldsmobile Cutlass Supreme

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