Question about 1999 Chevrolet Malibu

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Theftlock radio doesn't work. There was a cd stuck inside, i got it out, but know it won't turn on.

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Takes GM software to reset. Find someone with a programmer

Posted on Oct 07, 2009

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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

1 Answer

I have a 2000 grand prix gtp with a radio cassette...I want a radio cd player. I went to a junk yard and found a 2000 grand prix gt with a radio cd player....I bought it (the radio cd player), can i swap...


The wires will be the same. The problem is that the radio you bought may have theftlock on it. ( it would be printed on the front). If so you don't have the code for it. there is a slight chance that it will work, probably 1 in a 100. If it doesn't and the display reads LOC not LOCK, then you can take it to a dealer and they can recode it for you. Costs about 50 dollars here. Indy

Sep 08, 2011 | 2000 Pontiac Grand Prix

2 Answers

I have a pontiac 2004 van i need to unlock the radio


Your '04 is too new to unlock on your own.

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, you can try removing the fuse to your radio for 5 min and reconnect it. This will reset the radio back to default and re-read the Vin number to the PCM to match with the radio. At most time this will get your radio working again and all you have to do is to re program the pre-set and clock.

Aug 06, 2010 | 2004 Pontiac Montana

1 Answer

Unlock radio need code to lock radio mufflerman08@yahoo.com


Your '02 is too new to unlock on your own.

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 you may want to try pulling the fuse to your radio for 2 min and then reinstalling it. This may reset your radio and have the ECM recognize the radio matching VIN number to the Trailbalzer.

Jul 15, 2010 | 2002 Chevrolet TrailBlazer

1 Answer

I need a radio code to unlock gm part 10356164


Your '05 is too new to unlock on your own.

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 keep us posted.

Jul 10, 2010 | 2005 GMC Yukon

2 Answers

After my husband changed the battery in my STS, the CD player will not work. I have 3 CD's loaded in the player. It will not play or eject.


You need enter the unlock CODE for extract your CDs; check in your owners manual (any label in the last page .

THEFTLOCK is designed to discourage theft of your vehicle’s radio. The feature works automatically by learning a portion of the Vehicle Identification Number (VIN). If the radio is moved to a different vehicle, it will not operate. If the radio is removed from your vehicle, the original VIN in the radio can be used to trace the radio back to your vehicle.

With THEFTLOCK® activated, the radio will not operate if stolen.

Fot other details can check 2005-Cadillac-STS-Owners-Manual

Hope helps.

Jun 04, 2010 | 2005 Cadillac Escalade

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

2 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

Bose radio from cadillac catera


I have a Cadillac caters 2001 I switch out my stock radio Bose to a jvc deck. The deck work but no sound coming out

Feb 07, 2009 | 1997 Cadillac Catera

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