How do I know if my Suburban has AFM?
If you own a Chevrolet Suburban, you may be wondering whether your vehicle is equipped with Active Fuel Management (AFM), a technology that can improve fuel efficiency by temporarily deactivating some of the engine's cylinders under certain driving conditions. Knowing if your Suburban has AFM can help you understand your vehicle's performance and maintenance needs. In this article, we'll provide a detailed guide on how to determine if your Suburban has AFM.
What is Active Fuel Management (AFM)?
Active Fuel Management, also known as Cylinder Deactivation, is a technology developed by General Motors (GM) to improve the fuel efficiency of their engines. When the engine is operating under light load conditions, such as cruising on the highway, AFM can temporarily deactivate up to half of the engine's cylinders, reducing fuel consumption and emissions. When the engine requires more power, such as during acceleration or climbing a hill, the deactivated cylinders are reactivated to provide the necessary power.
How to Determine if Your Suburban Has AFM
There are a few ways to determine if your Chevrolet Suburban is equipped with Active Fuel Management:
- Check the Vehicle Identification Number (VIN): The VIN can provide information about your Suburban's engine and features. Look for the 8th digit of the VIN, which should be a "V" if your Suburban has the AFM system.
- Inspect the Engine: Lift the hood and look for a label or sticker on the engine that indicates the presence of AFM. This label may be located on the engine block or the intake manifold.
- Check the Owner's Manual: Your Suburban's owner's manual should provide information about the engine and any available fuel-saving technologies, including AFM.
- Use a Diagnostic Tool: If you have access to an automotive diagnostic tool, you can scan your Suburban's computer system to check for the presence of AFM. The diagnostic tool should be able to identify if the AFM system is active or not.
If your Suburban is equipped with AFM, it's important to understand how the system works and how to maintain it properly. Regular oil changes and monitoring the engine's performance can help ensure the longevity of the AFM system and maximize your fuel efficiency.
