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10-09-2021, 05:45 AM
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#1
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Senior Member
Join Date: May 2013
Posts: 513
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Duramax Fuel Filter
How often do you change your fuel filter?
When I first got my truck at 28K miles, it now has 107K miles. I used to get 15K miles out of one as recommended by GM. Now I only get between 2,500-7,500 miles on one. Same fuel station and the filter does not look dirty.
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10-09-2021, 07:35 AM
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#2
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Senior Member
Join Date: Jun 2012
Location: Southern NM
Posts: 9,562
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You don't say what year your Duramax is or if you are running stock or not, but fuel filters with OEM filter housing should easily get 12k - 15k.
Are you having any lagging, hard start, loss of prime, or loss of power problems?
The most common cause of only getting a few thousand miles before the DIC filter message comes up is bad fuel. The next is a leak in the filter housing head.
Might really look at your fuel or have a third party analysis done to determine if you need to drain/clean your tank and lines.
Check out the several Duramax forums for more detail.
I deleted my OEM filter housing and went with FASS lift pump and filter system. Best mod for my 2007 Duramax.
__________________
Scott and Liz - Southern NM
2012 Wildcat Sterling 32RL - w/level up (best option ever)
2007 Chevy 2500HD Duramax
Reese Fifth Airborne Sidewinder
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10-09-2021, 11:02 AM
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#3
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Senior Member
Join Date: May 2013
Posts: 513
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07 LMM all stock
Truck Runs fine but if I do a hard acceleration fuel rail psi dumps: desired 26K
5.4K followed by change FF alert w/68% remaining followed by limp mode
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10-09-2021, 11:22 AM
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#4
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Senior Member
Join Date: Jun 2012
Location: Southern NM
Posts: 9,562
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Ah. My son runs the 07.5 LMM. Nice truck. He did have 1/4 tank problem, so we put in a FASS lift pump, tank sump, and new fuel lines while were there. No more problems.
Definitely sounds like you have a fuel supply problem. I would look at the cheap stuff first like fuel, contaminated tank, bad fuel filter head, collapsing lines. Then look at FPRV and injector pump.
__________________
Scott and Liz - Southern NM
2012 Wildcat Sterling 32RL - w/level up (best option ever)
2007 Chevy 2500HD Duramax
Reese Fifth Airborne Sidewinder
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10-09-2021, 02:12 PM
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#5
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Senior Member
Join Date: May 2013
Posts: 513
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I have a aluminum aux fuel tank gravity transferred to the main tank. I replaced kinked fuel lines at the transmission. Replaced the FPRV w  lug. The filter head has no visible leaks.
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10-09-2021, 02:14 PM
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#6
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Senior Member
Join Date: May 2013
Posts: 513
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Quote:
Originally Posted by NMWildcat
Ah. My son runs the 07.5 LMM. Nice truck. He did have 1/4 tank problem, so we put in a FASS lift pump, tank sump, and new fuel lines while were there. No more problems.
Definitely sounds like you have a fuel supply problem. I would look at the cheap stuff first like fuel, contaminated tank, bad fuel filter head, collapsing lines. Then look at FPRV and injector pump.
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The FASS lift pump: how long do these filters last since it is constantly pumping fuel?
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10-09-2021, 03:04 PM
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#7
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Senior Member
Join Date: Jun 2012
Location: Southern NM
Posts: 9,562
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Quote:
Originally Posted by mfMcFroggierPod
The FASS lift pump: how long do these filters last since it is constantly pumping fuel?
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I usually change mine once a year just for good measure. I was lazy and the previous set was on the truck for about 25k. FASS recommends around 25k depending on conditions but I don't like that so I usually do it sooner.
My stock filter before the FASS was about the same, once a year.
The only time I have had to change filters due to flow problems was when I got some bad fuel on a trip. I changed filters once a day for three days and several tanks of fresh fuel (never letting it get past half) and then I was good for another 2 days until I got home and could thoroughly clean the tank.
We use our Duramax primarily for towing our 12k fifth wheel all over the country 
__________________
Scott and Liz - Southern NM
2012 Wildcat Sterling 32RL - w/level up (best option ever)
2007 Chevy 2500HD Duramax
Reese Fifth Airborne Sidewinder
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10-09-2021, 03:12 PM
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#8
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Senior Member
Join Date: Jun 2012
Location: Southern NM
Posts: 9,562
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Quote:
Originally Posted by mfMcFroggierPod
I have a aluminum aux fuel tank gravity transferred to the main tank. I replaced kinked fuel lines at the transmission. Replaced the FPRV w lug. The filter head has no visible leaks. |
The OEM filter head is good until it isn't. Mine was good for years and then I was replacing it or rebuilding it constantly due to loss of prime problems and when it got bad it would falter under load. The problem is it sucks in air so you usually don't see a leak.
When I finally had enough I installed the FASS. No more problems since. And it greatly improved pedal response. My wife still spins the tires when she takes it out
I did try to run the OEM filter and head with the FASS but that didn't work out for me, so I just deleted it entirely. Some folks seem to be successful doing that though.
__________________
Scott and Liz - Southern NM
2012 Wildcat Sterling 32RL - w/level up (best option ever)
2007 Chevy 2500HD Duramax
Reese Fifth Airborne Sidewinder
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10-12-2021, 10:22 PM
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#9
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Senior Member
Join Date: May 2013
Posts: 513
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Only 7,500 miles on this filter.
TP3012
Before -12 Vac
New Filter -3 Vac
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10-12-2021, 11:09 PM
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#10
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Senior Member
Join Date: Jun 2012
Location: Southern NM
Posts: 9,562
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Has to be fuel....
__________________
Scott and Liz - Southern NM
2012 Wildcat Sterling 32RL - w/level up (best option ever)
2007 Chevy 2500HD Duramax
Reese Fifth Airborne Sidewinder
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11-02-2021, 09:35 PM
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#11
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Member
Join Date: Feb 2016
Posts: 72
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I just replaced fuel filter on Sunday. I had 25K miles on filter and still have 50% life left. I usually change it once a year but this one was there 18 months. I also have AIR DOG lift pump.
__________________
2016 Hyper Lite XLR 30HDS
2015 GMC Sierra Denali 3500, Duramax,CC,LB,DRW, 3:73
2016 Ram Laramie 3500, Cummins,CC,LB DRW, 4:10
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11-03-2021, 01:32 AM
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#12
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Senior Member
Join Date: May 2013
Posts: 513
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Factory Filter plus the AirDog?
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11-03-2021, 04:18 AM
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#13
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Insert witty title here
Join Date: Apr 2016
Location: About 30 miles west of Beantown.
Posts: 4,034
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I change mine when my dashboard display tells me to.
__________________
2021 Transcend Xplor 247BH
Husky WDH with Sway Control
2021 Chevy Silverado 2500HD LT 6.6L V8 Duramax
Forever in my memory. Forever in my heart.
Laurie J. Wood 3/22/67 - 8/23/19
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11-06-2021, 10:51 AM
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#14
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Senior Member
Join Date: Dec 2016
Posts: 143
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2019 L5P stock. 15,000 miles
__________________
I'm not totally useless, I can be used as a bad example.
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11-06-2021, 05:56 PM
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#15
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Senior Member
Join Date: May 2013
Posts: 513
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Is this mileage solo or combined including towing?
Ex: 15K including towing
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11-06-2021, 08:29 PM
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#16
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Senior Member
Join Date: Jun 2021
Posts: 228
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I have had 3 DMAX trucks going back to an '06 LBZ. I change them all at 12K although the new L5P via the dash light will go to 15K. The reason is that the rail fuel pressure is now far higher then that '06 so why would I go up in change interval??
If I had your vintage then the FASS and an outboarded filter I would go more.
I know the older trucks are nice but the new ones are flat out freight trains. On the flat road doing like 64 mph and at 23K lbs combined weight I'm at about 1400 RPM.
'17 and up L5P motors already have a lift pump in the tank.
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