2021 Silverado DFM/AFM

[PClancey]

How can I tell if my Silverado Trail Boss has the DFM/AFM chip/module installed and functioning?

[bwoodsmn]

20 hours ago, PClancey said:

How can I tell if my Silverado Trail Boss has the DFM/AFM chip/module installed and functioning?

Did you buy the truck new?  The window sticker will say if the DFM is there, or if you were one of the ones that bought a truck with the DFM Delete there will be a credit listed in the build options..  If you bought it used, you can tell by the RPO Codes which engine you have, and that will also call out DFM or not. 

 

As far as functioning, some people can hear it, or you would need an OBD reader that could display that info.  Unlike the older AFM Trucks, there is no dash readout that shows engine status.

Edited June 3, 2021 by bwoodsmn
Clarity

[MCSarge]

What is the RPO Codes which engine you have, and that will also call out DFM or not?

[mjm-1957]

You will know if it has it when the pushrods bend and the lifter collapses.

[Silverado4x4]

19 minutes ago, mjm-1957 said:

You will know if it has it when the pushrods bend and the lifter collapses.

Wow your a funny man, just to let you know the motor still has the DFM internals just not the chip to activate. 

[Dunn]

info will be on the sticker

[PClancey]

Sorry to be a dumbass, but where do I find my RPO Codes?  I am looking the window sticker and I don't find any mention or credit listed.

 

(Bought it new BTW.)

Edited June 6, 2021 by PClancey

[Josef]

I saw something where it was only the engines from 2021 paired with the 8 speed trans that had afm/dfm deleted. 
 

here it is:  https://gmauthority.com/blog/2021/03/here-are-the-2021-chevy-silverado-gmc-sierra-models-that-will-keep-afm-dfm/

[PClancey]

Thanks Josef!  Very helpful.

 

I have a 10-speed tranny, so it looks like I have DFM.  (not sure if that is a blessing or a curse at this point)

 

 

Edited June 6, 2021 by PClancey

[Dunn]

1 hour ago, PClancey said:

Thanks Josef!  Very helpful.

 

I have a 10-speed tranny, so it looks like I have DFM.  (not sure if that is a blessing or a curse at this point)

 

 

Top right hand corner on my sticker it states engine

[EricTheRed]

Can the dealership do a DFM delete for those of us who don’t want the added noises and shuttering of this “seamless” system? 

[jlong1984]

20 hours ago, PClancey said:

Sorry to be a dumbass, but where do I find my RPO Codes?  I am looking the window sticker and I don't find any mention or credit listed.

 

(Bought it new BTW.)

They're on a sticker affixed to the inside of the glove box. (YK9) is the RPO for trucks not equipped with DFM. 

[jlong1984]

2 hours ago, EricTheRed said:

Can the dealership do a DFM delete for those of us who don’t want the added noises and shuttering of this “seamless” system? 

No.

 

If you want it gone, you have to do it yourself (or pay an indy shop) and void the GM warranty. 

[Bfavia]

On 6/4/2021 at 11:25 PM, Dunn said:

info will be on the sticker

It doesn't show either, bought new 

[Supreme Pizza]

On 6/2/2021 at 9:13 AM, PClancey said:

How can I tell if my Silverado Trail Boss has the DFM/AFM chip/module installed and functioning?

 

 

Simple.

 

Does it run? Does it sound OK? No check engine lights? Then you don't have DFM/AFM.