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2024 Chevy Tahoe 5.3 DFM Range Technology disabler questions?
Posted on 12/15/24 at 1:55 pm
Posted on 12/15/24 at 1:55 pm
Anyone on here have a 2022 or up GM vehicle that have tried the new disabler from Range Technology?
I have one on my 2018 Chevy Silverado 5.3. Seems to be working good so far.
I have one on my 2018 Chevy Silverado 5.3. Seems to be working good so far.
1
Posted on 12/15/24 at 3:32 pm to Northwest Louisiana
What does it disable?
Posted on 12/15/24 at 5:44 pm to Shepherd
The DFM makes the engine go from 1-8 cylinders depending on load on the engine to save fuel. On the newer ones it has around 16-18 combinations. The older ones just went from 4-8 cylinders. The Range stuff you buy disables this and keeps the engine in V8 mode. Just curious if anyone on here has used the new ones.
Posted on 12/16/24 at 7:22 am to Northwest Louisiana
I know nothing about this, but since you brought it up,
How well does the factory DFM work?
How well does the factory DFM work?
Posted on 12/16/24 at 10:33 am to Grassy1
This goes back to the 2010 range on the Chevy V8’s. The AFM (active fuel management) went from 4 cylinders to 8 cylinders depending on load to save gas mileage. It’s done with the computer and springs on the lifters shutting cylinders down when not needed. Less than 1% have issues based on numbers I’ve seen. Oddly enough I know 4 people that had issues with the AFM, they all bought the Range equipment for this version and the problems went away. I had a 2011 Tahoe with a 5.3, put around 135K miles on it. No issues at all. GM changed to DFM (dynamic fuel management) in 2019. Instead of going down to 4 cylinders from 8 cylinders it has around 16 different cylinder combinations to save fuel. One would think issues would arise over time. YouTube the topic, very interesting. I am just curious if anyone on here has tried the new Range equipment for the newer ones. I know the ones from 2010 - 2019 work.
If someone is more knowledgeable on this topic please add your input. My knowledge is very limited. I’m just trying to do everything possible to prevent any issues in the future.
If someone is more knowledgeable on this topic please add your input. My knowledge is very limited. I’m just trying to do everything possible to prevent any issues in the future.
Posted on 12/16/24 at 11:35 am to Northwest Louisiana
We just bought a 2024 Yukon XL 5.3, and after 2200 (approx. 70% hwy) miles I have yet to observe it in DFM mode. Long, flat highway miles from 55pmh to 75 mph. Not sure what parameters need to be present to activate it.
Posted on 12/16/24 at 12:01 pm to TheBoo
The newer ones (2019 and up) don’t display it like the ones prior did when they go from V8 to V4. The way I understand it on the 2019 and up the AFM is active all the time. People that have made adjustments to their exhaust systems really notice the change when the cylinders drop out. If you have stock exhaust you shouldn’t notice it. The issue is the lifter failure, oil consumption, etc that f you have a lifter issue with it sticking.
Posted on 12/16/24 at 1:13 pm to Northwest Louisiana
Sure, but I notice nothing, no RPM change, no MPG change, no engine tone change, zero. Not sure if it doesn't kick on until after a "break in period"?
That said, is the latest 5.3 iteration only direct injected or dual injected? Logically I can't see how changing to an intermittent fuel supply for each cylinder would cause valve train issues. Maybe a little oil to gum up the valves? If if it has port injectors that wouldn't be an issue.
That said, is the latest 5.3 iteration only direct injected or dual injected? Logically I can't see how changing to an intermittent fuel supply for each cylinder would cause valve train issues. Maybe a little oil to gum up the valves? If if it has port injectors that wouldn't be an issue.
Posted on 12/16/24 at 4:47 pm to TheBoo
Our 2020 5.3 has it, the only way to tell is looking at the fuel economy view where it shows instant - it'll say V4 or V8. Sometimes I am bored on long drives and try to see how long I can keep it in V4. Usually not long.
Posted on 12/17/24 at 8:08 pm to Northwest Louisiana
I’ll tell you right now, if you think that’ll stop lighter failure? you're wrong. Only way to make the engine more reliable is to pull lifters and replace them along with the cam shaft.
Ao new ones go 1-8 now? Boy that’s not worth a damn. 4 to 8 was bad enough. If I was you? I’d get rid of the junk and get a Toyota truck. New GM engines are crap with this junk fuel management to save gas. Bad enough they have 10speed trannies. This day and age there’s no sense in an ICE vehicle not getting 60mpg+
Ao new ones go 1-8 now? Boy that’s not worth a damn. 4 to 8 was bad enough. If I was you? I’d get rid of the junk and get a Toyota truck. New GM engines are crap with this junk fuel management to save gas. Bad enough they have 10speed trannies. This day and age there’s no sense in an ICE vehicle not getting 60mpg+
Posted on 12/17/24 at 10:47 pm to Methedup77
You sound like me when I've been drinking. And voice to texting. Toyota's a long way away from your economy standpoint.
Cheers mate
Cheers mate
Posted on 12/18/24 at 6:54 am to Maillard
No, I know Toyota trucks are lent built for economy purposes. But they’re more reliable
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