Fuel filter - Chevy and GMC Duramax Diesel Forum
11-16 LML Duramax Powertrain Discussion of components that are directly involved in the power production and all that is needed to get and keep the truck moving . Engine , Transmission, Etc.

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post #1 of 21 (permalink) Old 10-08-2019, 07:36 AM Thread Starter
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Fuel filter

Hey all. So this morning went to take my kids to school, truck started up no problem. However after driving about 200 ft it bogged down and DIC came on saying to change fuel filter. When I parked it last night filter was at 91%. So I have no idea what's going on. It is a '15 Silverado 2500 LML D-Max. Any insight would be helpful. Little nervous about the dreaded CP4 bomb...
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post #2 of 21 (permalink) Old 10-08-2019, 07:37 AM
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How many miles do you have on the filter? If it's over 10K, I'd just change the filter.
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post #3 of 21 (permalink) Old 10-08-2019, 07:41 AM Thread Starter
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How many miles do you have on the filter? If it's over 10K, I'd just change the filter.
I just bought it used with 71k. Have only put another 1000 on it since. Seller said it was just replaced in August...
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post #4 of 21 (permalink) Old 10-08-2019, 07:46 AM
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I just bought it used with 71k. Have only put another 1000 on it since. Seller said it was just replaced in August...
For ease of mind, I'd replace it. Furthermore, I would replace all the fluids/filters as well. The "seller" could have replaced it in August, maybe of last year.

Nevertheless, congrats on the purchase. Re-baseline your maintenance schedule by replacing all the fluids and filters. That way you know what's in there and when it had been replaced.

Just my thoughts...
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post #5 of 21 (permalink) Old 10-08-2019, 08:09 AM
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Quote:
Originally Posted by Fireman12983 View Post
When I parked it last night filter was at 91%. .....

Any insight would be helpful. Little nervous about the dreaded CP4 bomb...

....I just bought it used with 71k. Have only put another 1000 on it since. Seller said it was just replaced in August...
Doesn't sound good, sry.
Fuel filter life per DIC %, is 10+k miles.
Perhaps like @dlsolo suggested, maybe August of '18 (or the PO forgot to clear the DIC %).

It is possible though, since your fuel source differs from the previous owner...could be bad fuel related.
OR....
If you've been fueling up with B10/B20 bio, and the fuel system has never seen it, it can act like a solvent and clean out the black asphaltines coating all of the surfaces, which can quickly clog up a fuel filter.

Install a new TP3018 filter. If it is a Bio scenario, it will continue to flush things out (& clean injectors), and lube up the whole fuel system.
So having an extra filter on hand, might be prudent.

I would be cutting open the old filter to inspect for metal though.
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post #6 of 21 (permalink) Old 10-08-2019, 09:27 AM Thread Starter
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Originally Posted by dlsolo View Post
Quote:
Originally Posted by Fireman12983 View Post
I just bought it used with 71k. Have only put another 1000 on it since. Seller said it was just replaced in August...
For ease of mind, I'd replace it. Furthermore, I would replace all the fluids/filters as well. The "seller" could have replaced it in August, maybe of last year.

Nevertheless, congrats on the purchase. Re-baseline your maintenance schedule by replacing all the fluids and filters. That way you know what's in there and when it had been replaced.

Just my thoughts...
Yeah, I guess I'm gonna have to start putting some wrench time in. Was planning on doing a lift pump in the near future when I was gonna do the filter. I was more just concerned about the fact it went from 90's on the DIC to failure overnight. Wondering if anyone ever seen or heard of that before?
Thanks for advice
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post #7 of 21 (permalink) Old 10-08-2019, 02:58 PM
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Quote:
Originally Posted by Fireman12983 View Post
Hey all. So this morning went to take my kids to school, truck started up no problem. However after driving about 200 ft it bogged down and DIC came on saying to change fuel filter. When I parked it last night filter was at 91%. So I have no idea what's going on. It is a '15 Silverado 2500 LML D-Max. Any insight would be helpful. Little nervous about the dreaded CP4 bomb...

i had the same issue, ended up being a bad filter head. replaced it, added in the relocation bracket while i was at it, havent looked back since. If it was the CP4, you would know about it pretty quickly, my understanding is its not a very gradual failure and basically goes from working great to not starting period.

I believe in my case the filter head was leaking enough air into the system to cause it to detect a fuel restriction. The change was immediate after replacing the head, and i was around a similar mileage to you.


Quote:
Originally Posted by Fireman12983 View Post
Yeah, I guess I'm gonna have to start putting some wrench time in. Was planning on doing a lift pump in the near future when I was gonna do the filter. I was more just concerned about the fact it went from 90's on the DIC to failure overnight. Wondering if anyone ever seen or heard of that before?
Thanks for advice

i went from 90% and change to 0 % instantly on the highway without even turning the truck off. there was no sounds, change in power ect, just the dash warning showing me what i thought was a CP4 failure about to happen. Ended up replacing the filter head after a few comments on this forum recommended it and its been running great for months now.

2015 Chevy Silverado 2500 HD 6.6L LML

Last edited by J83; 10-08-2019 at 03:03 PM.
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post #8 of 21 (permalink) Old 10-18-2019, 08:27 PM
 
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I had a similar situation happen, fuel filter life went straight to zero while driving, reduced engine power notification as well. Changed the filter, helped for a bit, but the issue returned. Ended up pulling the bed and getting in the fuel tank, previous owner had dropped cardboard type seal off of a fuel additive bottle down the filler neck, would clog the pickup tube and starve the motor of fuel. Just a thought, make sure you don't have anything floating around the tank that shouldn't be there!
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post #9 of 21 (permalink) Old 10-18-2019, 10:41 PM
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Good info, Austin. I've been guilty of letting a piece of that foil that covers the top of unopened additive bottles fall into the filler before.

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post #10 of 21 (permalink) Old 10-19-2019, 08:21 AM
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What year is your truck?

If it is an 11-16 I think the first indication of a CP4 failure is that code. If that is the case, this is NOT good!

ANY other scenario would be a blessing!

2008 Silverado 2500HD CCSB LTZ Diesel
FASS 95 Lift Pump (with Baldwin filters), Edge Insight CTS Monitor on a Windshield Mount, Nicktane Fuel Filter Adapter w/ CAT 306-9199 UHE tertiary fuel filter, Bilstein 5100 Stock Height, Bushwacker Bed Rail Caps, AMP Research Bedstep, Fumoto oil drain valve, Dorman PS Oil cooler, Pioneer AVIC 7200NEX GPS/Stereo, Air Lift LoadLifter 5000 Air Bags.
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