How to Unlock GM Radio in a GMC or Chevy Car?

GM cars and Chevrolet cars are equipped with modern anti-theft radios. This is a wonderful discovery in the world of automotive. The system disables audio when someone steals or attempts the car. 

If the battery dies or the anti-theft radio is disconnected, some problems may occur and the system may need to be deactivated. In this case, you have to enter the radio code. It’s hard to hear, but it’s not.

Whether you have knowledge of automobiles or not, you don’t have to worry about unlocking an anti-theft radio. In this article, we will show you some simple steps that you can follow to easily unlock the radio in a GM car or Chevy car.

Make Sure Initially You Start

It is true that for an easy task like unlocking an anti-theft radio, you do not need any technical skills or special equipment. But there are two things you need to keep in mind. 

The first is that you have to be fast because you only have 15 seconds to complete the task. If you fail during this time, the whole task will have to start all over again. 

The second thing is to keep a piece of paper and pen or pencil at hand before starting the task. You will need to enter some code during the process. Since time is short, codes can be difficult to remember.

How to Unlock The Radio in a Chevy Car?

Okay, first we’ll figure out how to unlock the radio in a Chevy car. As we have said, the task is very simple, so let’s get started without any worries.

Stage 1

First, turn the key and turn on your car. Now sit in the car and turn on the radio.

Stage 2

Notice that there are some presets on the radio. With them, you need to bring a three-digit code to the display. Now hold down the 2 and 3 presets until the code is displayed. Quickly write down the code on a piece of paper.

Stage 3

Now press the FM/AM button from the radio dashboard. Notice that another code with three different numbers has appeared on the display. In this case, the digits can be the same as the previous ones without being different. Write this code correctly as soon as possible. So, with the initial three digits and the next three digits, you have a code of 6 digits in total.

Stage 4

There is a phone number for the Chevy radio code – 1-800-537-5140. Dial the number. When dialing, press the 1> 0> 6> 0> 1> 0 digits sequentially and finally press #. This will allow you to consent to the radio code recovery system.

Stage 5

Now at the beginning of this process you get a 6-digit code in two stages, enter it and press the * button. At this time, it is important to keep in mind that the order of the digits must be entered correctly.

Stage 6

Just after that, you will get a 4-digit code. Write this code down on a regular basis.

Stage 7

Turn on the car again at this stage, of course, the radio must also be turned on. Enter the 4-digit code into your car’s stereo system using the minute and hour buttons on the radio dashboard. Lastly, unlock your Chevy radio by pressing the FM/AM button.

How to Unlock The Radio in a GM Car?

Now is the time to know what to do to unlock the radio of a GM car. Like the previous one, this one is going to be a lot easier. So don’t worry, just pay attention.

Stage 1

First, insert the key and switch on the car. Then turn on the radio properly. Notice that the message “LOC” appears on the radio display. Do you know what that means? This means your GM car’s radio is locked.

Why is the radio of a GM car locked? When the car battery dies or the radio connection is disconnected for some reason, the radio does not turn on due to anti-theft technology. This time, it has to be unlocked.

Now don’t panic if the radio displays “RDS” instead of “LOC”. However, the concern is that the “RDS” message means that you will not be able to unlock the radio by yourself. So the solution? Go to a licensed GM dealership and raise the issue. They will fix it.

What if you don’t see any message and the radio doesn’t work at the same time? This means that the problem is probably somewhere else. In this case, there is no other way but to take the help of a skilled mechanic.

Stage 2

Now you have to show a code on the display just like the Chevy car. But in this case, the process is a little different. For a GM car, you need to hold down the Preset buttons 1 and 4 for at least 10 to 15 seconds. 

You must press and hold the two buttons together. After a while, the first code of 3 digits will appear on the display. Write the code correctly on a piece of paper. 

One thing to keep in mind is that if the radio dashboard does not have a 4 preset button, press and hold 1 and 3 or 2 and 3 presets instead.

Stage 3

Now you need to get the second 3-digit code. All you have to do is press the AM/FM button on the radio. Right after that, another 3-digit code will appear on the display. Like the Chevy car, you have a 6-digit code. 

Keep the first and second codes straight and write the code correctly on the paper. Now you have to contact your GM dealer and provide this 6-digit code and get a unique 4-digit  code. 

Stage 4

After receiving the 4-digit code, turn on the radio again. Hold down the clock button until 2 digits appear on the display. Now you get the first 2 digits. Enter it by tapping. 

The last four digits can be easily accessed by pressing AM/FM for all available stations before entering the secret pin pad. 

If you see the “SEC” message on the display, it means your GM car radio is unlocked. However, if the “INOP” message appears, then you have entered the codes incorrectly.


Whether it’s a GM car or a Chevy car, unlocking the radio of any car is not a difficult task at all. For example, after reading this article, you have learned how to unlock the radios of a GM car and a Chevy car very easily. 

You just have to follow the right procedure. Then we believe that you can unlock the radio of any vehicle without any cost. At the same time, we believe that our informative article will help you a lot.

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