We continue our series of web content on what can get stuck on your motor vehicle. After discovering why your fuel flap or hood could get stuck, today we’ll check out why the key is stuck in your GMC Sierra ignition . Specially irritating, having a stuck ignition cylinder will prevent you from starting and consequently from using your motor vehicle. We will so do everything we can to help you remedy this problem as soon as possible. To achieve this, first, we will explain to you what the ignition of your car is used for, then in a second time, why the ignition barrel of your GMC Sierra is stuck? And, at last, how to unblock the key stuck in your GMC Sierra ignition.


What’s the purpose of my GMC Sierra’s ignition lock?

The ignition lock of your GMC Sierra is a security feature. Its aim is to secure your car from theft attempts. It is installed on the steering column of your motor vehicle, created in 1931 by Abram Neiman. Its aim is to prevent your GMC Sierra from starting by blocking the steering and the steering lock if it does not recognize your motor vehicle key. It is closely linked to the starter switch which will integrate the key lock and an electric switch. There is a tendency to confuse the starter switch and the neiman, and when we talk about blocked neiman we often refer to a key that does not turn or does not turn well in the cylinder of the lock of your motor vehicle.

Why is the key stuck in your GMC Sierra ignition?

Now it’s time to explain to you why the key is stuck in your GMC Sierra ignition cylinder . Now that we’ve defined what the ignition is, it’s time to identify why it’s stuck. If it is the steering wheel of your GMC Sierra that is blocked, do not hesitate to browse our content on this matter. A neiman is not a wearing part that you change regularly but time has an influence on it and it can appear that you have to change it because of normal wear and tear. Here are the different reasons of a ignition that locks on GMC Sierra :

  • Regular wear and tear on the ignition barrel of your GMC Sierra : As we explained earlier, over time, the elements of the neiman can become seized up, or become packed with dust or small particles from the outside that will prevent it from working properly. In such a case, you should feel difficulty inserting and turning the key before it locks completely.
  • An element of the ignition of your GMC Sierra that breaks down: In the same logic, an element of the neiman can fail. As we explained in introduction, when we speak about the neiman we tend to include, the cylinder, the lock and the starter switch, if one of these parts is faulty, the neiman will not let the key turn in the cylinder of the lock
  • Someone forced too much on the ignition barrel of your GMC Sierra: At last, last opportunity, and it’s more or less rational, if someone forced too much on the neiman in unlocking the steering wheel of your motor vehicle before, he may have twisted internal components and thus damaged the neiman of it.

How do I unlock the key stuck in my GMC Sierra ignition barrel?

We now move on to the solutions available to you for fixing a key stuck in your GMC Sierra ignition . According to the origin of your problem the solutions will not be similar, find them down below:

  • Ignition barrel blocked because of a twisted key: If your key is twisted, it is obvious that your neiman will not unblock. Try gently with a mallet to straighten your key, if you can’t do it, use the copy of your key.
  • Ignition cylinder If the neiman of your GMC Sierra is clogged because of impurities : Use a WD40 type degreaser and let it work for a few moments, it should unblock the neiman of your GMC Sierra.
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  • If your key is stuck in your ignition because of a faulty element: If finally it is because of an internal element that your ignition lock is no longer unblocked you will sadly have to change the whole block (electronic switch, lock cylinder, neiman), we recommend you to go to a expert who will also have to give you a new key to begin your GMC Sierra.


If you wish more guides on the GMC Sierra, go to our GMC Sierra category.