nick14226
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That applies to the pick ups, they changed mid 2022. For SUV’s it’s 21-up 5.3 or 6.2
DFM disabler released
- Thread starter 66 Galaxie
- Start date
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Silverado4x4
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No not that easy, DFM lifters require a different cam for that system. Can't install standard lifters on a DFM cam.
I’m not trying to put together a parts list. I just want to know if the disabler will handle the programming part of the DFM delete. That said, if I’m going to put a new cam in, I’d rather have better performance and then I need a tune anyway.
tom3
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Just a side note on those lifters. Seems to me that keeping the lifters pumped up full time would have to eliminate most of the failures we've seen. When those lifters collapse due to the oil cut off all those little internal parts do take a beating. And I wonder why there are no direct retro fit lifters that work with the AFM original camshaft?
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DontTaseMeBro
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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 modelI've had it on our 2013 for several years and it simply plugs into the ODB2 port and stays there.
We have annual emissions inspections here in metro-PHX, so all I do is unplug it before heading in for the emissions test (all they do is plug into OBD2 port and check for any emissions related MIL codes) and plug it back in when I get home.
No issues to date and our Tahoe runs great with it!
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KC 2013 Tahoe
Member
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.
Lil Timmy Shy
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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.........
KC 2013 Tahoe
Member
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.
