Tip & How-To about Chevrolet Impala

How to unlock GM Theftlock Radios.

This is a step by step intruction on how to unlock GM theftlock radios. Click on the link and type "how to unlock GM Theftlock Radios" in the search box. Follow the instructions closely. www.articlesbase.com.

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gm radio says locked

https://www.kingbain.com/unlock-gm-theftlock-radios/

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May 11, 2017 • Pontiac Cars & Trucks

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Why is my radio locked?

Unlock GM Theftlock Radio

How to Unlock Your Chevy or GMC Radio Without Paying Dime

How to Unlock Your Locked GM Theftlock Radio

i can link more from my quick google search, but you should get the idea after those links and video

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Apr 13, 2015 • 2005 Chevrolet TrailBlazer

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The dvd player in my 2005 Chevrolet Impala stopped working properly so I purchased same type radio from same type vehicle from a wrecking yard. After installation of radio it played for awhile but then "lock" displayed and radio stopped playing. I understand that it's a security feature, but how can I get the unlock code.

Go to this website. It has step by step instructions: www.articlesbase.com In the search box, type in "how to unlock GM Theftlock radios".

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Jan 23, 2011 • 2005 Chevrolet Impala

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unlock radio need code to lock radio [email protected]

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.

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Jul 15, 2010 • 2002 Chevrolet TrailBlazer

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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.

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Jul 10, 2010 • 2005 GMC Yukon

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How to unlock GM Theftlock Radios.

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