Chevy and GMC Duramax Diesel Forum banner
  • Hey Everyone! Enter your ride HERE to be a part of this months Ride of the Month Challenge!
1 - 1 of 1 Posts

111 Posts
Hey all. Needing some help...

I have a 2016 LML. Elected to go with the S & B 'wet' filter intake. I had ran the same brand/style on my 2009 Powerstroke and liked it.

Long story short.. Having major issues.

Towed my 26 foot travel trailer 3500mi over a 30 day period and was plagued with intermittent check engine light. Had my own code reader, and this is what lit up:


The truck has 64k miles on it, and I have taken pristine care of it with all of the regular scheduled maintenance, premium fluids, etc.

I've been running Duramaxtuner tune file (in sport econ mode) since April 2018 and put about 25kmi on the truck. During the trip mentioned above, I ran their 'light tow' tune. Upon the check engine light coming on for the first time, I flashed the truck back to stock right away.

I've running the S&b intake since February 2020, and only put about 10k mi on the trick with it.

I brought the truck with check engine light into my local/friendly Chevrolet dealership that I have dealt with for a long time. They are giving me a tough time, mentioning that 'aftermarket air filters/intakes' are known to cause major problems with the LML platform - and that they'd strongly recommend removing it and replacing it with the stock air box. They mentioned specifically that they have even seen engine rebuilds due to air intake issues. (which I thought that seemed a bit extreme?) At the end of the day it's just an air filter...

The dealership also mentioned that the truck's Turbo is going to need to be replaced based on one of the codes above. Fortunately, they are going to cover it through warranty, despite the intake technically being an alteration of the platform.


1. What do you think caused the Turbo to go out specifically - the Duramax Tuner tune, or the S&b intake?

2. Regrettably, I was on the fence, and decided to toss the stock intake after installing the s&b in truck. Chevrolet wants $950 for a replacement stock intake (parts). Should I remove the s&b, and repurchase a stock intake?

3. Doing a bit of research on the forums, I have heard that on the LML platform, the MAF sensor is known to have problems with even the slightest amount of filter oil being sucked in. With this, should I have gotten s&b's dry filter option instead? Should I loop in s&b on this issue and request they send me a dry filter?

4. The s&b intake came with a rubber plug that goes in the bottom of the intake box. It lists the piece as optional during install, obviously allowing for more airflow with the plug removed. I had left it out upon install. Would adding the plug back in make a difference / possibly help resolve this?

Long read.. Thanks for following along. I hope that this post helps others, and I also hope that someone might be able to shed a bit of light so I can figure out my next steps... As of right now, Chevrolet has a replacement turbo on order that will be here in the next week. I will need to decide what to do with the s&b. I want to avoid future issues as I plan to keep the truck for awhile.

Thx in advance!


2016 LML
You are very lucky they are replacing the turbo under warranty. Your aftermarket tune would have been a warranty killer in a lot dealerships. Your long relationship with your dealer is paying off and keeping them happy would be a good thing until the end of your 5 year/100K mile powertrain warranty, but is it worth the cost of a replacement OEM intake system? Shop around if you go that route and avoid buying it from the stealership.
I have run an oiled aftermarket air filter by Green Filters USA in my DuraMax for over 40K miles without any issues despite large holes in the front side and bottom of the factory air box. Termites? I have used that brand of air filter with resonator deletes on more than a hand full of vehicles for over 15 years with zero issues.
1 - 1 of 1 Posts
This is an older thread, you may not receive a response, and could be reviving an old thread. Please consider creating a new thread.