DEF fluid level sensor issues
- Thread starter USMC84-93
- Start date
Youre getting way too hung up on superceded part numbers being “faulty parts”. Thats not the reason.
Anyhow, its time for a sending unit. Your pump may or may not go out soon. Aftermarket pumps and sending units flat out suck. We will not install any aftermarket part in these trucks because you are lucky to get 6 months to a year (most the time, they dont make it out the bay).
Failure rate of the l5p sending units and pumps are far less than lml. Atleast out here.
I am not familiar with the DEF "sending unit" (other than fuel pump or the DEF Injector) and cannot find that part in GMPartsDirect. How do you determine that they are "GM" parts and not knock offs because this pump looked every bit of the part? The NOX1 has been complaining for a while unlike the worn glow plugs which didn't raise their head until one reported 3v. I'd like TRUMP to permit the DEF to be BANISHED as a climate change agenda. As soon as I fix this thing I am going to sell it and buy something PRE 1970.
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The "sending unit" is the thing 2004LB7 pointed to in the picture in the first reply to you. It looks like a modern toilet float.
Aftermarket can LOOK exactly the same, but the tolerances and materials are not, hence why they just dont work like GM parts. Its like that with many cars now, aftermarket parts just dont work right.
Just stay pre-2007 if you decide you still need a Duramax. No EPA bullshit.
Aftermarket can LOOK exactly the same, but the tolerances and materials are not, hence why they just dont work like GM parts. Its like that with many cars now, aftermarket parts just dont work right.
Just stay pre-2007 if you decide you still need a Duramax. No EPA bullshit.
The only thing that I can find for find for a "sending unit" for for the diesel fuel tank. The level is part of the DEF pump. The diesel fuel is reading normal. It is saying ""DEF REDUCTANT Fluid Empty." That's my point / misunderstanding. If I was still in the Marines we would be telling me to change the air in the tires, use the left handed monkey wrench and a bunch of other pranks. I just don't get how changing the fuel sending unit would change the reductant fluid level.
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Uh, yeah. The only person in this thread who DOESN'T seem to understand there's a DEF tank sending unit is you. How ELSE do you think your current message on the dash pops up ? Magic? Yes, its part of the pump assembly, and its faulty. Go back and look at the picture in post #2.
As your old drill sergeant may have said, "Get yer head outta yer ass, private!"
A sending unit is what tells the ECM or DIC the fluid level of a tank. Often times they are integrated with the pickup and sometimes a lift pump. Just depends on location, fluid and purpose. So, yes, there is a sending unit in the DEF tank. Terminology can sometimes be different between documents, trade speech and other sources. So while one source may call it a sending unit, and another a fluid level sensor. They are in fact the same thing. DEF tanks and related components are still in its infancy so there will be some confusion for at least a number of years before people start to understand the nomenclature and differences between all the various systems
Don't get hung up on wether it's called a sending unit or fluid level sensor. Just fix the reason the signal is not reporting to the ECM on the fluid level. Then move onto the next issue
The yellow arrow is where the level is on my model DEF Pump (Module Kit (Replaces Part Number 84416299) - GM 84545446. There are only 2 other parts on the DEF tank. The DEF Module Reductant Control Module (center image below) - GM 84631875 and the other part I cannot find (which is most likely the part that you are speaking about) which I presumed was the heater core (image below right). I cannot get the numbers on that unit or "sending unit" to come up with any parts.
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The sending unit is the entire white and black unit that also has the def pump apart of it. Its the part you have replaced. You need another. Go to the dealer or rockauto and get an acdelco OE part (it will say ac delco OE). China is real good about making acdelco copies and selling on amazon/ebay. Dorman and all the aftermarket suck
You cannot buy any separate part, only the whole damn thing again. That other part you took a pic of on the tank is the reductant quality sensor. When that sensor fails, your buying a whole tank to get it.
You cannot buy any separate part, only the whole damn thing again. That other part you took a pic of on the tank is the reductant quality sensor. When that sensor fails, your buying a whole tank to get it.
What is the other unit that is right next to the pump, please?
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