Does the GM 6.0 Have AFM? Looking for Insight!

Questions and Support
1

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!

Thanks in advance for your help!

2

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.

3 Likes
3

That’s a fantastic way to save fuel. It seems like a win-win! Do you know if AFM affects engine performance when it switches back to full power?

5 Likes
4

AFM primarily benefits fuel efficiency, especially during highway driving. It seamlessly switches between 8 and 4 cylinders, which helps maintain performance without sacrificing economy.

5

That sounds impressive! I’m curious if there are any downsides to having AFM in the GM 6.0.

6

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!

4 Likes
7

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?

8

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.

6 Likes
9

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!

1 Like
10

Exactly! Plus, it can help the engine last longer due to less wear on parts when operating on fewer cylinders.

11

While AFM has its benefits, I do wonder if it could lead to higher repair costs later on. Any thoughts?

1 Like
12

That’s a valid concern! However, many 6.0 owners seem to be satisfied overall with the technology and its benefits.

13

Let’s be real—if I can save a few bucks on gas while still enjoying my truck’s power, I’ll take that any day! AFM has been a great feature for me.

14

I agree with you! Nowadays, every little bit helps. Overall, AFM provides a nice balance between power and efficiency in the GM 6.0 engines.

3 Likes
15

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.

16

That’s really interesting! I’ve heard some models were hit or miss with that feature. Does anyone know if the AFM is standard on all Sierra models?

1 Like
17

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!

18

That’s good to know! I was looking at a 2011 Denali. Does anyone have experience with the performance of the AFM on this model?

19

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!

5 Likes
20

What is AFM, exactly? I’m not familiar with the term.