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Old 03-25-2020, 09:21 PM   #1
JScott0801
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Tuners for a 2013 Duramax LML

Hey everyone so I recently bought a 2013 GMC Sierra 2500hd LML duramax..so I found out a few things meaning the truck had already had the def deleted and it has a S&B intake on it...is there any tuners I can use with the truck already deleted..? Any help would be appreciated very much
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Old 03-29-2020, 03:52 PM   #2
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Sent you a PM...
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Old 03-29-2020, 05:59 PM   #3
Jfreek65
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Tuners for a 2013 Duramax LML

You can check out Duramaxforum for some great tips on your LML, but most will suggest custom tunes from a reputable company on an edge tuner.
XtremeDieselPerformance does some good work:


https://www.xtremediesel.com/edge-pr...r-touch-screen

https://www.xtremediesel.com/gm-2001...-custom-tuning
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Old 03-29-2020, 06:19 PM   #4
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If it has some emissions taken off it has to have some kind of a tune or it wouldn't be going down the road.

Their are no emission delete tuners in the US unless they are undercover.
If you're in Canada I think you have options.
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Old 03-30-2020, 04:19 AM   #5
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Quote:
Originally Posted by 77cruiser View Post
If it has some emissions taken off it has to have some kind of a tune or it wouldn't be going down the road.

Their are no emission delete tuners in the US unless they are undercover.
If you're in Canada I think you have options.
I was kind of surprised to see quite a few tuners for the Duramax LML on eBay that purported to be DPF, DEF and EGR delete capable. In the Ford tuner world most of the companies that used to be go-to (like SCT) have removed the delete capability and as noted, the delete must be dealt with via custom tunes.


https://www.ebay.com/itm/Chevy-GMC-D...ox!78056!US!-1
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Old 03-30-2020, 04:39 AM   #6
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I have to wonder how trustworthy a Ebay tuner is?
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Old 03-30-2020, 08:12 AM   #7
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Quote:
Originally Posted by wiredgeorge View Post
I was kind of surprised to see quite a few tuners for the Duramax LML on eBay that purported to be DPF, DEF and EGR delete capable. In the Ford tuner world most of the companies that used to be go-to (like SCT) have removed the delete capability and as noted, the delete must be dealt with via custom tunes.


https://www.ebay.com/itm/Chevy-GMC-D...ox!78056!US!-1
The "last line disclaimer" on that eBay tuner says: "Off Road Organized sanctioned Race Use only"...

I'd guess this was a "private sale truck" since no dealerships around this area will sell a truck with "emissions deleted". I can't say "it's illegal to sell" but I will say that in every state I've checked, "it's illegal to operate on public roads". That tuner states: For Off Road Organized sanctioned Race Use only...
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Old 03-30-2020, 08:15 AM   #8
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Had '13 GMC Duramax that was bone stock that I traded off with 138k on the odometer that towed a 16.5k 5th for nearly half of those miles averaging 11mpg towing 17mpg empty with more than enough power everywhere we traveled.
With cost of the delete + the tune not sure I'd of ever broke even in that 138k miles with the 1-2 mpg savings or the savings of +/-$12 worth of DEF every 3500 miles & surely didn't need more power.
I've out grown the need for speed & "rolling coal" looked like a waste of diesel fuel, but that's just me!
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Old 03-30-2020, 09:25 AM   #9
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I'm sure the laws change, or are enforced differently, from state to state. I've seen trucks advertised on lots in Oregon that are stated as deleted.

I know the MiniMaxx Tuner has a delete setting. That's what came in my RAM that was deleted when I bought it.
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Old 03-30-2020, 09:40 AM   #10
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I may be "off track" with my observations, but having lived through the "seat belt phase in" (complete with automatic seat belts, interlocking seat belt/ignition systems, buzzers, bells and whistles), the "5MPH front bumper phase in", the "unleaded fuel phase in", the "compact cars becoming large car phase in" and now the "diesel/DEF phase in" I can say that in every one of those "transition periods" many people were "reluctant to accept the alternatives" and a few were "positively not going to agree"...

From those "phase in's" came "seat belt bypass systems", "catalytic converter delete kits", "front bumper delete kits" and now "diesel/DEF delete kits".
Some were sold under the guise of "return to the old, proven method", some as an "improvement for new problems", some as "we'll get even with those mandates and prove we don't need them" and some as "just because I can" improvements....

In the end, pretty much every one of those "work around to keep the old way viable" attempts has "failed and most people are now using seat belts/buckling up, driving smaller cars, no longer notice the front bumper and using DEF without "hyperventilating with every container added to the truck"....

I'm suspecting there will always be some who "want to live on the performance edge" but for most people, just trying to find parts to keep repairing the "deleted/work around systems" has proven more costly and a bigger hassle than it's worth for most of us.....

Diesel delete kits and tuners will likely become the "catalytic converter delete kits of the 1970's. When was the last time you saw a JC Whitney catalog with the "proverbial catalytic delete tube for $29.99 plus shipping??? ... YMMV
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Old 03-30-2020, 10:55 AM   #11
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John, I'm sure you're right. There are lawmakers in Oregon currently trying to make regulations for diesel trucks much tighter than they currently are. I won't be surprised when they eventually succeed. As it stands, diesel trucks >=8500 lbs GVW are exempt from DEQ testing. So deleting all of the emissions overhead to improve horsepower, mileage, and longevity is pretty common.

I don't know if it's true or not, but have read and been told that the EGR systems can reduce the life of diesel motors, from ~500,000 miles to under 200,000 miles, while improving emissions. I know that my EGR is still intact, although I do have the delete kit for it and my MiniMaxx tuner (from the original OP question) has a setting for that. All of the catalytic stuff on mine has been removed by the previous owner. I do have it all if I ever have to have it reinstalled.

Seems to be a moving target and I can't imagine that DEQ requirements will get less but only tighter.
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Old 03-30-2020, 12:03 PM   #12
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I know deleting emissions systems is a "touchy subject". Some are "hard over against it" and some are "hard over protecting the right to do it". We were in Palmdale/Lancaster last year, a return trip to where we lived in the early 70's. Back then (the 70's) every morning we'd watch the smog cloud rise over the southern mountains as the LA traffic snarled to a halt. This past summer, the sky was clear, no smog and all the traffic reports indicated the traffic was as bad or worse than ever... So, all that "smog crap" must be doing something to help the cloud that used to be there and isn't any longer.....

We didn't have the time to go into LA and I'm not sure if that's a blessing or a missed opportunity, but that's another story.

I suppose, as the earth population grows, so does the need to restrict what we do to "dirty the air we breathe"... Like you, I can't imagine the regulations will ever become less restrictive. I'd guess "tomorrow's vehicles" will be even "cleaner than today's vehicles".

As for "exemptions for diesel engines" even the newer diesel tractors are using DEF and require ULS diesel fuel. They are never on the public roads.... I heard a rumor that the new lawn mowers, 3.5HP or greater will have more restrictive emissions and noise standards.... Try finding a 2 cycle outboard on the "new, still crated warehouse".... The world, she is a changin'
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