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Why is my Suburban key not turning?

If your Suburban key is not turning, it could be due to a few common issues. The most likely causes are a problem with the ignition switch, a stuck or worn-out lock cylinder, or a dead key fob battery. Let's explore these potential problems and how to troubleshoot them.


Ignition Switch Issues


One of the most common reasons a Suburban key won't turn is a problem with the ignition switch. The ignition switch is responsible for sending the signal to the engine to start when you turn the key. If the switch is faulty, it may not be registering the key turning, preventing the engine from starting. This could be due to a wiring issue, a problem with the switch itself, or even a computer problem in the vehicle's electrical system.


Stuck or Worn-Out Lock Cylinder


Another potential issue is a stuck or worn-out lock cylinder. The lock cylinder is the part of the ignition that the key physically goes into. Over time, the internal components can become worn down, causing the key to not turn smoothly or get stuck. This could also be the result of a problem with the key itself, such as a bent or damaged key blade.


Dead Key Fob Battery


If your Suburban has a keyless entry system, a dead key fob battery could also prevent the key from turning. The key fob communicates with the vehicle's computer to unlock the doors and allow the engine to start. If the fob's battery is dead, it may not be able to send the necessary signal, making it difficult or impossible to turn the key.


Troubleshooting Steps



  • Check the ignition switch for any signs of damage or wear, and have it tested by a mechanic if necessary.

  • Inspect the lock cylinder for any signs of sticking or wear, and consider having it replaced if the key is not turning smoothly.

  • Replace the key fob battery if your Suburban has a keyless entry system.

  • If the key is still not turning, it's best to have a professional mechanic diagnose and repair the issue to ensure the problem is properly addressed.


Addressing the root cause of a Suburban key that won't turn is important to ensure the safe and reliable operation of your vehicle. By understanding the potential issues and taking the appropriate troubleshooting steps, you can get your Suburban back on the road in no time.

Kevin's Auto

Kevin Bennett

Company Owner

Kevin Bennet is the founder and owner of Kevin's Autos, a leading automotive service provider in Australia. With a deep commitment to customer satisfaction and years of industry expertise, Kevin uses his blog to answer the most common questions posed by his customers. From maintenance tips to troubleshooting advice, Kevin's articles are designed to empower drivers with the knowledge they need to keep their vehicles running smoothly and safely.