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L5P Duramax

Old 11-24-2020, 11:33 AM
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Default L5P Duramax

Anyone have experience with this or similar? My only ambition is eliminating the regens.

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Old 11-24-2020, 12:02 PM
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Not sure that would completely work, and you would still need new exhaust and/or gut your current exhaust. not sure how they get around the timers either with that. I understand fooling the sensors, but the truck will also regen at a preset interval regardless if it needs it or not
Old 11-24-2020, 01:19 PM
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should work. all it is doing is tricking the sensors as if the dpf is there, basically telling it that the dpf is always good and not show that a regen is needed.
Old 11-24-2020, 01:44 PM
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The L5P isn't something you want to cheap out on. To be honest no tunes would be worth getting cheap. I would steer clear of anything that isn't from a reputable shop. The L5p has very few in the game right now that can delete and not potentially ruin the truck. You need to honestly remove all the emissions equipment if you want it done correctly and have the truck last. If not your asking for trouble down the road.
Old 11-24-2020, 02:07 PM
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look into the emissions intact tuning that may take care of what your looking for!
Old 11-24-2020, 03:04 PM
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I'm currently at 87k miles on my 2019, and no problems so far. Heavy towing everyday
Old 11-24-2020, 07:28 PM
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Originally Posted by Codycat View Post
I'm currently at 87k miles on my 2019, and no problems so far. Heavy towing everyday



Likely the reason for your success - they like to stay hot
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Old 11-24-2020, 08:44 PM
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Originally Posted by HTJ View Post


Likely the reason for your success - they like to stay hot

are you having problems with yours?

My truck is only used for towing (i have 6400 miles on it) but thinking if I did run into issues Id trade for a gas.
Old 11-25-2020, 03:35 AM
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Originally Posted by Roswell View Post
are you having problems with yours?

My truck is only used for towing (i have 6400 miles on it) but thinking if I did run into issues Id trade for a gas.
From what I gather they got alot of the kinks worked out on the l5p. That being said I hear they still don't like short trips, on a regular basis
Old 11-25-2020, 06:34 AM
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Originally Posted by Codycat View Post
From what I gather they got alot of the kinks worked out on the l5p. That being said I hear they still don't like short trips, on a regular basis
none of the emissions equipped diesels do. they need to get hot and stay that way for a little bit. 10-15 miles on the highway once its warmed up is usually sufficient, doesn't need to be a huge amount of miles. Idling and city driving clogs the DPF up faster and just needs heat and time to clean it out.
Old 11-25-2020, 06:37 AM
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I have the L5P. I like it, other than having to put in the def.
Old 11-25-2020, 06:44 AM
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Originally Posted by Rolandt03 View Post
should work. all it is doing is tricking the sensors as if the dpf is there, basically telling it that the dpf is always good and not show that a regen is needed.
Truck is still going to want to complete a regen based either on time or miles, regardless of what the sensors are saying about DPF soot load. It is possible to have the sensors fool it into believing that conditions are not correct for a regen, but it will still want to do it after X amount of time/miles. Couple of possibilities there:
A) they have built in some sort of logic to tell the truck its completed a regen and continually resetting the timer (i doubt this as it appears to just connect to exhaust sensors)
B) Truck is going to think it needs to regen, but see sensors are telling it conditions aren't right, and set a CEL
C) Truck is going to initiate a regen and you will blow raw diesel out the exhaust (somewhat doubt this scenario too)
Old 11-25-2020, 07:04 AM
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Whats the big deal with the regens anyways. Rarely do I know its even doing it
Old 11-25-2020, 07:34 AM
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Originally Posted by Roswell View Post
are you having problems with yours?

My truck is only used for towing (i have 6400 miles on it) but thinking if I did run into issues Id trade for a gas.
0.0 Problems. just looking into the possibility of eliminating or reducing the regens.

Originally Posted by Codycat View Post
Whats the big deal with the regens anyways. Rarely do I know its even doing it
You don't notice the 300 RPM increase in idle speed, 40% reduction in economy or the heat coming from underneath the truck?
Old 11-25-2020, 08:52 AM
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I don't notice mine in regen unless I turn it off during one. I drive it like I want to and don't care otherwise. The truck gets the same mileage if not better than my prior 06 deleted and tuned truck. As for reduction in mileage during regen, I could care less.
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Old 11-25-2020, 10:08 AM
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Originally Posted by HTJ View Post
0.0 Problems. just looking into the possibility of eliminating or reducing the regens.



You don't notice the 300 RPM increase in idle speed, 40% reduction in economy or the heat coming from underneath the truck?
I notice a higher idle once in a while. Never could tell on economy, probably because it gets so much better mileage than my 6.0 gas . Only notice heat once in a while when hooking up trailer. I would hardly consider any of those a nuisance, but that is just my perspective.
Old 11-25-2020, 03:02 PM
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If you're going to delete then do it right. On an L5P, that means new ECM, TCM, removing the EGR, DPF, etc. Not an easy task and expensive but it will be an absolute beast and never have regen issues ever again.
Old 11-25-2020, 04:18 PM
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Originally Posted by wamc0206 View Post
I don't notice mine in regen unless I turn it off during one. I drive it like I want to and don't care otherwise. The truck gets the same mileage if not better than my prior 06 deleted and tuned truck. As for reduction in mileage during regen, I could care less.

Huh? I got way better fuel mileage with my tuned LBZ and my tuned and deleted LML than my L5P. Not even close. The L5P is the worst truck I have had for fuel but that had a lot to do with not being willing to delete it.

If it wasnt 5-6 grand to delete it, I would have done it on day 2 of ownership.
Old 11-25-2020, 04:38 PM
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Originally Posted by ytmorris View Post
Huh? I got way better fuel mileage with my tuned LBZ and my tuned and deleted LML than my L5P. Not even close. The L5P is the worst truck I have had for fuel but that had a lot to do with not being willing to delete it.

If it wasnt 5-6 grand to delete it, I would have done it on day 2 of ownership.
my L5P is going under the knife next week. Im interested to see how much more responsive it is. Pretty excited to be honest.
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Old 11-25-2020, 05:03 PM
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Originally Posted by ytmorris View Post
Huh? I got way better fuel mileage with my tuned LBZ and my tuned and deleted LML than my L5P. Not even close. The L5P is the worst truck I have had for fuel but that had a lot to do with not being willing to delete it.

If it wasnt 5-6 grand to delete it, I would have done it on day 2 of ownership.
I got a solid 14-15mpg period pre tank of fuel unloaded. I got about 8-9 towing my boat. I get 16-18 out of the L5p and I also get 9-10 towing. So for you maybe not but my L5p is overall a much better truck than my old LBZ.

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