3 Steps to Fix GMC Radio Not Working

Dealing with a GMC radio that’s not working can be frustrating. You might be wondering why your radio stopped functioning and how to fix the issue. Don’t worry, there are some common reasons for radio malfunctions in GMC vehicles.

In some cases, the problem could be due to a software glitch or an issue with the head unit, amplifier, or speakers. By identifying the cause of your GMC radio troubles, you can take the necessary steps to troubleshoot and hopefully resolve the problem. Stay tuned as we delve deeper into this issue and possible solutions.

Common Issues For GMC Radio Not Working

Intermittent Sound And Volume Problems

Occasionally, you may experience intermittent sound and volume issues with your GMC radio. This can be due to a problem with either the head unit, amplifier, or speakers. If you do have volume coming out of the radio, it is most likely a software problem, and that can usually be resolved by restarting the head unit itself.

Power Issues

Sometimes, GMC radios might not receive power properly, leading to non-functioning radios. These power issues can be solved by checking various fuses such as Fuse 18 and Fuse 34, which are the main fuses for the radio circuit. Make sure to also inspect other fuses in the left and right hand side fuse blocks inside the vehicle for the bcm and radio.

Frozen Infotainment Systems

Your GMC radio might also suffer from frozen infotainment systems, causing the screen to go black or become unresponsive. This is often due to a connection issue or a software glitch that can sometimes be addressed with an HMI update. If that doesn’t resolve the problem, you can also try disconnecting and reconnecting various connectors to ensure proper communication between the radio components.

Remember to always consult your vehicle’s manual or a qualified technician when addressing radio problems to ensure safety and proper troubleshooting.

Troubleshooting Steps And Fixes

Resetting The Radio

If your GMC radio is not working, one of the first things you can try is resetting the radio. To do this, make sure your vehicle is in “Park” and turn off the engine. Wait for a few minutes, then restart the engine. This simple process can often resolve minor software glitches or electrical issues.

Checking Fuses With Test Light

Another possible cause for your radio not working could be a blown fuse. To check fuses, you’ll need a test light. First, locate your vehicle’s fuse panel, which is typically found under the dashboard or in the engine compartment. Using the test light, touch the metal points on each fuse. If the test light doesn’t illuminate on both sides of the fuse, it’s likely blown and needs to be replaced.

Rebooting The Infotainment System

Sometimes, the issue might be with your vehicle’s infotainment system and not the actual radio. To reboot the infotainment system, put your vehicle in “Park” and press and hold the phone hangup button on the steering wheel for 10 seconds. This process can often resolve any minor software issues or glitches affecting your radio.

By following the troubleshooting steps outlined above, you can quickly identify and resolve common causes for your GMC radio not working.

Possible Software and Hardware Replacements

Software Updates

Sometimes, the issue with your GMC radio not working might be related to the software. In such cases, you can try to update the infotainment system’s software to fix the problem. To verify the current radio software version in your vehicle, go to Settings > About > Build Number > Information “i”. If there’s a new software update available, it’s recommended to install it, as it could resolve the issue with your radio.

Replacing Audio System and Head Unit

If updating the software doesn’t help, the problem could lie in the audio system or the head unit (the part of the infotainment system that controls the audio functions). In this case, you may need to replace the audio system or the head unit in your vehicle. Before doing so, consult with a certified GMC technician to identify the exact issue and get the right replacement parts.

Antenna And Speaker Replacement

Another possibility for your GMC radio not working could be related to the antenna or the speakers. If it’s an antenna issue, you may have trouble receiving radio stations, while speaker issues can cause distorted sound or no sound at all. To diagnose the problem, check if the antenna connection is secure and the door speakers are functioning properly. If you identify any issues with the antenna or speakers, consider replacing them to restore your radio’s functionality.

Remember, it’s essential to diagnose the issue correctly to determine the right course of action. Consult with your local GMC dealer or a certified technician if you need assistance with troubleshooting or performing the necessary repairs.


It’s frustrating when your GMC radio stops working, but there are some simple methods to try and resolve the issue. Start by checking if the fuse for the radio has blown and replace it if needed. You can also try rebooting your vehicle’s infotainment system by pressing and holding the home and fast-forward buttons for 10 seconds.

If the problem persists, it’s worth reaching out to your dealership or a professional technician who can further diagnose the problem. Stay patient and follow these steps; you’ll likely find a solution soon.

  • Eric Williams

    I'm the founder of Daily Car Tips. I wrote articles in the automotive industry for more than 10 years, published in USA and Europe. I love sharing my knowledge and insights with fellow enthusiasts. Join me on this journey as we explore the exciting world of cars together!

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