chevy cobalt bcm problems

Chevy Cobalt BCM Problems: Causes, Symptoms, and Solutions

If you own a Chevy Cobalt, you may have experienced some issues with your Body Control Module (BCM). The BCM is an important component that manages various electrical systems in your car, including the headlights, power windows, and air conditioning. When it malfunctions, it can cause a range of problems, from minor annoyances to serious safety concerns. In this article, we will discuss the causes, symptoms, and solutions of Chevy Cobalt BCM problems.

Causes of Chevy Cobalt BCM Problems

There are several reasons why your Chevy Cobalt BCM may fail. One of the most common is electrical overload. The BCM is responsible for managing many electrical systems, and if there is a sudden surge in power, it can cause the module to malfunction. Another cause of BCM failure is physical damage. If the module is exposed to moisture or extreme temperatures, it can become damaged and stop functioning properly.

In addition, faulty wiring or a malfunctioning alternator can also cause problems with the BCM. These issues can cause an improper voltage that can damage the module and other electrical components in your vehicle. Generally, these causes occur over time, and the symptoms of problems with your BCM may become worse over time.

Symptoms of Chevy Cobalt BCM Problems

If your Chevy Cobalt is experiencing BCM problems, there are several symptoms you should look out for. One of the most common is a failure of the power windows and locks. These systems are controlled by the BCM, and if they stop working, it is likely that the module has failed. You may also notice that your headlights are not working correctly. They may flicker or not turn on at all.

Another common symptom of BCM problems is a failure of the air conditioning system. If the module is not working correctly, it may not be able to regulate the temperature in your car, or the fan may not work at all. You may also notice problems with the audio system, including a loss of sound or static.

If you notice any of these symptoms, it is important to have your car inspected by a qualified mechanic. Ignoring these problems could lead to more serious issues down the road.

Solutions to Chevy Cobalt BCM Problems

If you are experiencing problems with your Chevy Cobalt BCM, there are several solutions that you can try. In some cases, a simple reset of the module may be all that is needed. You can do this by disconnecting the battery cables for a few minutes, then reconnecting them.

If a reset doesn’t work, replacing the BCM may be necessary. This is a complex job that should only be performed by a qualified mechanic. They will need to diagnose the problem and then remove the old module and install a new one. Depending on the severity of the problem, this may be an expensive repair.

Finally, there are some preventative measures that you can take to avoid BCM problems in the future. Regular maintenance of your car’s electrical systems, including the alternator and wiring, can help prevent electrical overload and damage to the module. You should also be careful not to expose the BCM to moisture or extreme temperatures.


Chevy Cobalt BCM problems can be frustrating and even dangerous, but there are solutions available. If you notice any symptoms of BCM problems, it is important to have your car inspected by a qualified mechanic. Whether it requires a simple reset or a full module replacement, taking care of the problem promptly can save you time, money, and prevent future problems.


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