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The New Trail Boss

shippert
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Is DFM a good thing?  

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shippert New Member

shippert

Posted
Posted

Love the new 2021 Trail Boss, Bought back in Nov 2020, Love it so far. I see that Chevy this week is removing the DFM from the 5.7. Not sure how I feel about that? I really like the fuel mileage I'm getting glad I got. Thoughts on the DFM good & Bad?

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Gangly Senior Enthusiast

Gangly

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Posted

Is there an announcement somewhere that they are deleting DFM from new production vehicles? I'm not arguing in the slightest, I simply haven't seen any announcements so this is news to me and I would like to know more about this.  

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ChrisR2021 Enthusiast

ChrisR2021

Posted
Posted (edited)
2 hours ago, Gangly said:

Is there an announcement somewhere that they are deleting DFM from new production vehicles? I'm not arguing in the slightest, I simply haven't seen any announcements so this is news to me and I would like to know more about this.  

Here on GM-Trucks.

https://www.gm-trucks.com/chevy-gmc-will-temporarily-drop-afm-dfm-fuel-saving-tech-silverado-sierra-1500/

 

I have only driven my 2021 Silverado RST about 600 miles so far. I love the 20+ mpg.  That is a lot better than the 10.3 mpg that my 2013 2500HD averaged over the 8 years that I owned it. 

Edited by ChrisR2021
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Ithan Henry Enthusiast

Ithan Henry

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Posted
1 hour ago, Descartian said:

I’d rather not have it for a 1mpg gain. Too many things to go wrong. I am putting a Range Disabler on mine until the engine swap. 

I'm with you on this point. I do mostly city driving so I'll take all 8 going 24/7.

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GreatWhiteMexican Enthusiast

GreatWhiteMexican

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Posted
On 3/20/2021 at 2:15 PM, Descartian said:

I’d rather not have it for a 1mpg gain. Too many things to go wrong. I am putting a Range Disabler on mine until the engine swap. 

I totally agree with you. If I wouldn’t take a loss on my truck, I would trade it for one that doesn’t have AFM/DFM. 

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