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L5P Fuel filter housing

16K views 59 replies 14 participants last post by  TTBadDog  
#1 ·
So im at 37k now. The first time i changed the fuel filter last year i just got the paper drop in and did that. This time when i asked the dealership for a new fuel filter they sold me a whole new housing with a new filter in it. It has a new drain thing and the electrical plug on top and all. I just went with it and replaced the whole thing. Is that necessary? Cuz it was kind of a pain in the butt to unbolt from the frame bracket. Or should i just do the paper filter every time?
 
#7 ·
I honestly didn’t pay attention. I bought the cabin filter and oil filter and stuff while i was there and didn’t really pay attention to the box being heavier than it should have been. Lol. But no i assume it was not the same part number. I just figured maybe it was good to change the whole thing here and there. But 🤷🏻‍♂️
 
#3 ·
I don’t know why they sold you that assembly. Perhaps they were out of the element.
I found most auto parts stores sell WIX filter that are less expe than the dealership.
WIX is a great filter.
WF10451
 
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#5 ·
Nonsense. Warranty can not be void due to aftermarket service parts.
 
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#15 ·
My apologies for listing oil filter manufacturing companies of GM and Wix.
‘I was not aware that GM/ACDelco used different companies to manufacture different products.
We all learn something new everyday.
 
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#16 · (Edited)
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Two WIX filters I have on my shelf, along with an IFJF filter with the same markings.
Perhaps WIX has an old catalog picture.
 
#17 ·
Well that's just awesome, thanks for the update. Nice to have options in this new world of supply chain issues.
 
#18 ·
Delco fuel for the L5P is a Mann n Hummel. Delco has many different suppliers and it's part number specific who the mfg is.

Of note, this is common among all the filter manufacturers nowadays..... it's cheaper to source low volume filters from someone else or the OE supplier until they figure the part number is a high volume. The older Duramax fuel filter is a hood example. Lots of brands sold them but there were only a few who actually made the filter.
 
#21 ·
I only got that to do a comparison. No plans to use it. Came with a billet housing.
 
#22 ·
That or your dealership was simply out of stock for filter only and sold you the housing/filter. Apparently the price is close since it didn't set off any alarms when ya paid the bill.
 
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#26 · (Edited)
Sorry to drag up an old thread, but maybe the OP was a previous Cummins owner, where fuel filter changes are more like $225 if you buy the parts at the dealer. $53 seems like a bargain.
The cheapest I ever got online was around $125.
 
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#27 ·
Cummins filters now are $150 plus shipping from Geno's. $225 from the dealer sounds like a deal. I think my dealer wanted about $260. Last time I'll ever call them.

It's a bit painful, yes, but it's a much better fuel filtration setup than GM is offering. That's probably the biggest Achilles heel on the latest Dmax, imo. I don't trust it. I do trust the Ram filters. It's a shame, I feel like the Dmax could be the strongest HD diesel platform going if GM could just get it all together. It's probably just the bean counters that need kicked in their beans!
 
#28 ·
That's probably the biggest Achilles heel on the latest Dmax, imo. I don't trust it.
Yea, I'd say you learned that lesson the worst possible way.
Glad to see you still hanging around...
Order your '24 GMC Denali Ultimate yet? 🤪
 
#35 ·
Oh, and that's the second time the truck broke down.
@blythkd1 can add more details, but the first event he went through may have also been a filter failure. I'd really have to dig to find his earlier posts. That thread was the easy find.
 
#37 ·
Oh, and that's the second time the truck broke down.
@blythkd1 can add more details, but the first event he went through may have also been a filter failure. I'd really have to dig to find his earlier posts. That thread was the easy find.
Thanks.
It’s reasons like that I am scared to buy a different truck. There are a decent amount of horror stories, and it seems like the newer trucks are worse yet.
Has anyone used the Baldwin filter that you posted in that thread? Or is it more advisable to switch to the fleece, wc fab, or black market filter head with the Donaldson or Cat?
 
#40 ·
#41 ·
There is also a dual filter mount from BMP that fits the 17-19 trucks that filters and separates properly like the VSE. It ships with a CAT separator and filter (nothing special but the yellow paint) but has 1-14 threads for both the sep, and the filter, gives you a few more options as far as what you eventually thread on from Donaldson or Fleetguard. The VSE has different threads for the separator (but 1-14 for the filter). Both are quality.
 
#49 · (Edited)
True. The original 01 to 16 Duramax filter for example,was actually an exceptionally good filter and water separator, yet the internet was filled with 'upgrades' using pretty dubious interpretations of specs and costs to make it look like a "must have".

As far as the L5P goes, @blythkd1 experiences and in my case dissecting one of these filters to have a look at thier construction, has given a few people a reason to have doubts. Are failures widespread.....no, absolutely not.
 
#46 ·
That was heavily debated and I thought that style filter would eventually allow water past once it filled.
Please fact check me on that though, but that is what my memory serves.
 
#47 ·
This is my opinion, but what I'm basing it on is factual. And I am only talking about L5P set ups that take the stock TP1015 filter. Any of the single filter aftermarket setups have the WIF sensor on the clean side of the filter. If your water in fuel light/message comes up there is absolutely nothing between your injection system and that water. The folks who make the single filter setups say it would never be an issue, but most of them also market the single filter as the CAT 1R0750, a 4 micron (absolute not marketing schmoo) single stage non water separating filter. It's a good filter but it's not an effective water separator. If the sensor was on the dirty side of a single filter set up I'd be more comfortable with it. The factory single filter is actually a dual filter with a center core of a water phobic ultra fine screen, and it's after the sensor so you have protection. My preference for the dual systems is they improve on the weakness of the stock unit but function in a similar manner by having a failsafe after the WIF sensor.

While @blythkd1 experiences aren't widespread, they sure as F were expensive for him. If someone doesn't want to have faith in the OE setup, they should at least replace it with one that has similar safeguards and methods as what GM originally wanted, but chose to do with less robust components.