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I’ve wonder myself but have been told multiple times that the window sticker would have stated that it didn’t have it. My window sticker says the only things I didn’t get was the 4 way lumbar and parking sensors(which later were retrofitted). So I dunno how to confirm for sure.
This was only true of the full size trucks, all the SUV’s always had it.
They do have DFM all the components are inside the motor but they are not activated due to the chip shortage.
Never was deleted from SUV's, only the trucks.
Wouldn't that which you described be the AFM disabler? (Not DFM)
Their website says this product is designed for "refresh models" in reviewing my paperwork for my 2022 Tahoe, I can see no reference to the word "refresh".
That applies to the pick ups, they changed mid 2022. For SUV’s it’s 21-up 5.3 or 6.2
No not that easy, DFM lifters require a different cam for that system. Can't install standard lifters on a DFM cam.
Just the sensors. The 4 way lumbar would have been a $50 credit on the window sticker. It wasn’t. Only the parking sensors were.
Apples and Oranges 2013 vs. late model
AFM cuts off oil to the lifters on 4 cylinders, whereas DFM is a bit more elegant in that it selectively decides which cylinders to cut out. The disabler works on either system, both of which eventually destroy our engines and transmissions in favor of marginally better fuel economy.
I understand that. I have a Range Technology disabler. It plugs into the port under the steering wheel (2014 Tahoe). But I think what these fellows are talking about is a new type disabler which requires some additional steps to install. See post #3 in this thread regarding what must be done to install. If I am misreading something, please let me know. Sorry for the confusion.........
No problem! I can only reference my '13 Tahoe and experience with it. Not sure why they need to cut into their fender liner, but perhaps they're trying to get at the ECU/ICM to get them reprogrammed. I do plan to someday have our Tahoe's ECM tuned to cancel the AFM and also fix an extreme timing retard issue when its above 100 outside (I live in metro PHX). Even with 91 octane Premium and several tanks of Techron the stock ECU retards the timing in hot temperatures to the point where she's gutless accelerating from a standing stop. Below 100, she runs like a dream. Never has been any discernable detonation so hoping the high temperature ignition retard can be tuned-out.
