I’ve been researching the 6.0-liter engine found in various GM vehicles, particularly Chevrolet trucks and SUVs, and I’m curious about the Active Fuel Management (AFM) feature.
What is AFM?
Active Fuel Management allows the engine to deactivate half of its cylinders under light-load conditions to improve fuel efficiency. This is particularly interesting when considering the overall performance and economy of owning a vehicle with this engine.
My Interest
I might be looking to buy a used Chevrolet truck with a 6.0 engine, and I’ve heard mixed reviews about whether this engine is equipped with AFM.
Are all 6.0-liter engines equipped with AFM?
If so, what has been your experience with it?
Have any issues come up regarding maintenance or performance because of this feature?
Performance and Efficiency
It would be great to hear from others about their experiences with the AFM feature. Has it significantly impacted your fuel savings?
Additional Thoughts
Is there anything else I should know about the 6.0 engine’s AFM feature before making a decision? Would love to hear your inputs!
Active Fuel Management (AFM) is a technology in GM engines that improves fuel efficiency by deactivating half of the engine’s cylinders during light-load driving. The GM 6.0 does have AFM, providing both power when needed and savings on gas when not.
AFM primarily benefits fuel efficiency, especially during highway driving. It seamlessly switches between 8 and 4 cylinders, which helps maintain performance without sacrificing economy.
Some users report that the transition between cylinder deactivation can be noticeable, which might not sit well with all drivers. However, many find the fuel savings worth it. It’s all about priorities!
AFM is definitely a worthwhile feature! I enjoy the benefits it provides while driving my 6.0. But hey, has anyone experienced any mechanical issues related to AFM?
Good question! I haven’t had issues myself, but I heard that some people faced problems with lifters related to AFM. Regular maintenance helps avert that though.
It’s funny how complicated some engine technologies can be! But overall, AFM in the 6.0 is great for occasional heavy towing and everyday driving. You really notice the savings!
The GM 6.0 engine does have AFM, but it’s primarily found in certain models like the Chevy Silverado and GMC Sierra from 2007 onward. It’s always good to double-check the VIN for specifics.
Not all Sierra models come with AFM. Only certain trims like the SLT and Denali have it. Even within those trims, it can vary by year. Best to research the specific year you’re interested in!
I’ve driven a 2011 Denali with AFM. It seems to improve fuel economy when cruising, but I’ve noticed a bit of noise during transition. Worth it if you do a lot of highway driving!