Active Fuel Management (AFM) is a technology used by General Motors (GM) to improve fuel efficiency in many of their vehicles. It works by shutting down cylinders in the engine during light-load conditions, essentially turning your V8 into a V4 for better gas mileage. But how do you know if your GM car is equipped with AFM? Here are a few ways to find out:
1. Check the Owner’s Manual:
Your trusty owner’s manual is the first and most reliable source of information. Look for sections on engine specifications, fuel economy, or features. If your car has AFM, it will likely be mentioned there, often with explanations of how it works and its benefits.
2. Look for AFM Badges or Stickers:
Some GM vehicles with AFM have badges or stickers on the engine cover or near the dashboard that say “Active Fuel Management” or use the AFM logo. This is a quick visual indicator, but not all GM vehicles with AFM have these markings.
3. Identify V4 or AFM Indicator on the Dashboard:
Certain GM models might have a dashboard indicator that lights up or displays “V4” or “AFM” when the system is engaged. This signifies that the engine is currently operating in fuel-saving mode using fewer cylinders.
4. Online Resources and VIN Lookup:
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Manufacturer Website: You can search the official website of your car’s brand (Chevrolet, GMC, Buick, Cadillac) using your model year and trim level to see detailed specifications mentioning AFM if equipped.
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VIN Decoder Websites: Several online VIN decoders allow you to enter your Vehicle Identification Number (VIN) and retrieve detailed information about your car, including factory-installed features like AFM.
5. Consult a Mechanic:
If you’re still unsure, a certified mechanic familiar with GM vehicles can inspect your engine and identify components related to AFM. They can also check your car’s computer for diagnostic codes that might indicate the presence of AFM.
Additional Tips:
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Keep in mind that AFM technology is referred to by different names across GM brands. For example, it might be called Dynamic Fuel Management (DFM) in some Cadillac models.
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Remember, AFM is not available on all GM vehicles. It’s typically found in specific engine options for certain models.
By following these methods, you should be able to determine whether your GM car has Active Fuel Management and gain a better understanding of this fuel-saving technology.
