I've heard the same thing covered in this video from several sources, so the first thing I did when I bought my 2016 GMC 2500… like within a month…was add a lift pump, do the CP3 conversion and DPF delete.
The fuel pump on my 2002 Sierra died this week so I had to take it in for replacement. I have a 2015 Sierra LML that I typically don't drive in the winter - I use the 02. Since the 02 is now in the shop, I have to drive the 2015. We've had really low temps (@ 4 days with highs in the minus zero range). The past week it's been in the upper 30's to low/mid 40's. When I started the 2015 it struggled to start - took 5-6 attempts and finally started. However, the "engine" icon lit and has stayed on. There's no message anywhere (I had to have the 2015 DEF system serviced/replaced by a Chevy dealer a couple of years ago under warranty) and at that time I got a message to check the DEF system with the speed reduction notice. The shop that's working on my 02 doesn't have the ability to read diesel codes if there are any (the 2015 has 48,000+ miles). I did have it's fuel filter replaced this past summer so probably less than 3,000 miles on. The nearest dealer that serviced the 2015 for the DEF repair is @ 55 miles away (I drove it there and they gave me a ride back home, then picked me up when the work was done so no complaints there). The owners manual just says to check the emissions system when this icon lights and stays on. I haven't tried disconnecting the batteries to see if that does anything (a Duramax forum member said that "fixed" his problem). As it's now the weekend I can't contact the dealer until Monday. Any ideas/suggestions in the meantime?
Thanks for this video. Very informative. Im on the edge - days away from buying a 2016 GMC 3500hd Denali Duramax with 81k. An unmolested beauty in incredible condition. Replacing my 2009 Sierra which has nearly 600k. Keep up the great work - im a new subscriber!
2015 4x4 LML here, remove all that emissions crap, swap to CP3 and lift pump, it’ll be the best thing you ever did for your truck. She’s currently at 260k and still purrs like a kitten and I have no intentions of letting her go anytime in the foreseeable future.
Actually, the DEF heater problem affects all users. If a heater fails, even at temperatures well above freezing, you still end up in limp mode. I know because I had a tank heater fail en-route to Alaska in the Yukon, 130 miles from Whitehorse. The warning appeared on the DIC, and informed me that I had 150 miles to go before I'd be limited to 4 mph. We got back to Whitehorse and spent a week waiting for a new tank (you can't just replace the heater). You'd think the bright bulbs who impose these limits would design a better system, and allow more miles.
Hus - Thanks for the feedback! We have made quite a few Cummins and Powerstroke content, but not to the extent of the Duramax's. Are there any that you want to see in particular? We'll add them to our list.
@@8020Media the way you break down your videos I'd love them all lol 89-12 dodge 13-present rams, 94-present powerstrokes. I'm convinced if I ever go duramax I'd choose LML with no emissions
So far... biggest issues with my lml.. is emmisions. Plan on deleting that. I had to replace egr bypass, egr valve, egr pipe cracked, for some measure of reliability i replaced egr coolers with aftermarket "Bulletproof". Idk.. sick of messing with my lml, i want to play with my l5p finally
@@8020Media you guys are badass. Never would i say tho.. lml is bad engine. One of the best, great sounding power houses of an engine. Just have to live in a emmision free county to take full advantage
There’s much more to mess with on l5ps than lmls… parts are more expensive… there’s many more emissions parts & related sensors… tuning is wayyy more expensive. L5p is the way to go though if looking to upgraded and to get a newer warranty for all of those parts. So depending on what your do with your trucks, ymmv
Looking to buy a 16’ LML 170k already tuned/deleted.they had it 4 years no problem super clean. Shop just did some suspension work and checked the fuel system everything was fine but it’s still on the stock cp4
Well the delete is definitely a positive, 170k without CP4 issues is good but certainly wouldn't hurt to reinforce it a bit or replace it given mileage on it.
There is a lot of legal reasons not to do it - really depends where you live and what the emissions testing requirements are. Starting to give out pretty hefty fines to people who get caught with deleted trucks and shops are getting hit hard too so if you can't do it yourself it's difficult to get it done.
Because TH-cam as well as many other social media outlets, work with the US government to illegally spy on its citizens, thanks to the "Patriot Act", and it only takes one call from a unelected bureaucrat in the EPA to demonetize your account if you suggest, teach, or inform people about things that go against their narrative or their interests... Diesel shops that have TH-cam channels have been shut down and or fined by the tyrants in the EPA for teaching people how to do it or shops that do deletes... if you think that the US is a free country, guess again! Keep voting democrat and soon we will have Soviet and Chinese style gulags!
@@8020Media people just don’t have common sense getting hard to find😂 but thanks man I don’t know either to get a L5 P or lml because I’m a pipeliner and I don’t wanna spend all the money on a truck if I can get the same thing for cheaper lol
I’m looking to buy a deisel more for the power and other big truck things , I just put over 300k on my 05 Yukon and wanting a pickup im currently looking at a 2006 duramax with 191k and 2011 duramax with 136k. Definitely hoping to get something just as reliable as my yukon was
LML is good if you delete everything. Otherwise my preference would probably be the LLY - just do the necessary cooling upgrades and make sure it's been taken care of.
When I changed my 2015 over to a CP3 and doing a delete on it after blowing 2 CP4 pumps with less than 120.000 miles on it ,it required a adaptor kit to install the CP3.but it was well worth the $12,000 ca it cost to do it all.
do you have any opinions on the crankshaft? I'm looking at buying a 2011 LML with 180,000 miles, but I've heard some stories of the crank breaking because of the firing order. is this a common issue?
Definitely not common, I wouldn't worry about the crank unless you are planning a high horsepower build. The crank is known to have issues but not really until you start talking about 700whp+ or big torque numbers
If you’re looking for a used lml and you know your going to delete the emissions at what point do these failures start. Or is it best to look at another year range
M - Unfortunately, there isn't a set mileage these tend to fail. But the quicker you delete, the better. We can't recommend this legally, but isn't a bad idea.
My 13 has 395k km. Def has been deleted. If you used a fuel lubricant, swap out the factory cp4 for an aftermarket cp4 or do a cp3 conversion, add a lift pump, do an emissions delete, you'll never have an issue. Motor will last forever.
I suppose that really depends what you are trying to do with it but more importantly what matters is the condition of the truck and how well it has been maintained. If you're looking at 2012 as a year in general I'd probably get a Cummins but that's just me. That platform had at least been around since 2007.5 and isn't one of the first few years of a new platform like a 2012 LML is, and earlier model 6.7 Powerstrokes are known to be a bit more problematic too, mostly just early kinks from a new engine. Not to say an LML is a bad choice by any means. Just depends the condition it's in and what you're trying to do with it.
Couple more things TCM failure and electronic fan clutch failure. I also had the low pressure P/S hose come off of the P/S pump. I just got rid of my LML. A money pit!!!
@@8020Media I traded it in about a month ago with just over 112K miles. I have the service records and I can reply back on the mileage when service work was done. Beautiful LML and I was noticing a vibration holding the steering wheel when stopped like the engine was out of balance so I said to myself no way am I paying a shop to tear into this to find the reason. It was maybe 6 months before I had the CP3 changed and took it up the *** for that expense. With no hope on the GM clas action lawsuit I said I am not paying for anything else. Gone!
@@8020Media A crotch rocket 2SS Camaro. Now I find out about GM's dirty secret called AFM/DoD. That crap is coming off and permanently disabled. I'm not replacing lifters or some motor because of it.
@@dskize1my 15 lml cp4 just crapped out at 230k so i would say the truck is worth buying but be sure to use a fuel lubricant and ride on..repair cost is $12k.. ps..the 9th injector didn’t come with the repair kit so the mechanic bought it separately.
LML is the worst out of the entire bunch. The few problems that they do have, while rare, are all quite catastrophic. Head gaskets, fuel system, and they break more cranks than any duramax before it. Do what I did and skip it for the L5P. Absolutely love mine.
You are smoking something. The LML engine is great as long as you take care of the CP4 issue and add a lift pump. I would not trade mine for an L5P. Mine is tuned and deleted and will smoke stock L5Ps all day long.
Looking at a work truck model l Regular cab king bed truck this weekend for 10,500. Has 280k been D & T and lots of maintenance. Anything I should worry about you think?
Just did a full delete on my 2011 gmc after dealing with def and egr and being stuck in limp mode heading home from seattle , man ol man rooling that cole shure makes my baby scream for joy ....enjoy the government rules poot n nannys
With the tirade the government is on, and as a business, hope you understand we can't go making those recommendations. But we understand the benefits and reasonings for why people do it
@8020Media I also live in north Idaho, a few hours from Canada Lotta mountains ,Lotta F the government low key lifestyle It's just how we do things in the 208 Man I'm thankful to be from beautiful coeur d alene
@@8020Media I have an LML with 189k miles emissions still equipped cp4 going strong. run hotshots EDT every tank. but warranty just expired so that’s my next move. Cp3 conversion / Tuned & Deleted.
I've heard the same thing covered in this video from several sources, so the first thing I did when I bought my 2016 GMC 2500… like within a month…was add a lift pump, do the CP3 conversion and DPF delete.
0 - Best thing to do!
The fuel pump on my 2002 Sierra died this week so I had to take it in for replacement. I have a 2015 Sierra LML that I typically don't drive in the winter - I use the 02. Since the 02 is now in the shop, I have to drive the 2015. We've had really low temps (@ 4 days with highs in the minus zero range). The past week it's been in the upper 30's to low/mid 40's. When I started the 2015 it struggled to start - took 5-6 attempts and finally started. However, the "engine" icon lit and has stayed on. There's no message anywhere (I had to have the 2015 DEF system serviced/replaced by a Chevy dealer a couple of years ago under warranty) and at that time I got a message to check the DEF system with the speed reduction notice.
The shop that's working on my 02 doesn't have the ability to read diesel codes if there are any (the 2015 has 48,000+ miles). I did have it's fuel filter replaced this past summer so probably less than 3,000 miles on. The nearest dealer that serviced the 2015 for the DEF repair is @ 55 miles away (I drove it there and they gave me a ride back home, then picked me up when the work was done so no complaints there).
The owners manual just says to check the emissions system when this icon lights and stays on. I haven't tried disconnecting the batteries to see if that does anything (a Duramax forum member said that "fixed" his problem). As it's now the weekend I can't contact the dealer until Monday.
Any ideas/suggestions in the meantime?
Love owning a deleted 2016 LML. By 2016 apparently a lot of the injection issues were fixed so I’ve heard no need for a lift pump
U - We agree.
Thanks for this video. Very informative. Im on the edge - days away from buying a 2016 GMC 3500hd Denali Duramax with 81k. An unmolested beauty in incredible condition. Replacing my 2009 Sierra which has nearly 600k. Keep up the great work - im a new subscriber!
THDC - Wow! 600k, that is impressive! Sounds like take great care of your machines. The new truck is going to be a beast.... Keep us updated on this!
2015 4x4 LML here, remove all that emissions crap, swap to CP3 and lift pump, it’ll be the best thing you ever did for your truck. She’s currently at 260k and still purrs like a kitten and I have no intentions of letting her go anytime in the foreseeable future.
D - We can't recommend, but yes you are correct! Very well said. Thanks for sharing your experience.
@@8020Media completely understand brother, I live in Mexico.
Actually, the DEF heater problem affects all users. If a heater fails, even at temperatures well above freezing, you still end up in limp mode. I know because I had a tank heater fail en-route to Alaska in the Yukon, 130 miles from Whitehorse. The warning appeared on the DIC, and informed me that I had 150 miles to go before I'd be limited to 4 mph. We got back to Whitehorse and spent a week waiting for a new tank (you can't just replace the heater). You'd think the bright bulbs who impose these limits would design a better system, and allow more miles.
James - Thanks for sharing your experience! This will be helpful for future viewers.
My def tank and dpf somehow fell off and haven't had any problems since 🤷♂️ So weird
Damn potholes!
I love your videos so educational, have you done the same on the Cummins series and power strokes as well ?
Hus - Thanks for the feedback! We have made quite a few Cummins and Powerstroke content, but not to the extent of the Duramax's. Are there any that you want to see in particular? We'll add them to our list.
@@8020Media the way you break down your videos I'd love them all lol 89-12 dodge 13-present rams, 94-present powerstrokes. I'm convinced if I ever go duramax I'd choose LML with no emissions
H - Sounds good! We'll keep doing them. We do have an LML mod guide in the works and will likely come out on the 11th. Make sure to stay tuned!
So far... biggest issues with my lml.. is emmisions. Plan on deleting that.
I had to replace egr bypass, egr valve, egr pipe cracked, for some measure of reliability i replaced egr coolers with aftermarket "Bulletproof".
Idk.. sick of messing with my lml, i want to play with my l5p finally
N - This seems to be a common them and why delete kits are so popular. Sorry to hear about your experience.
@@8020Media you guys are badass. Never would i say tho.. lml is bad engine. One of the best, great sounding power houses of an engine. Just have to live in a emmision free county to take full advantage
We appreciate it.💪🏻
There’s much more to mess with on l5ps than lmls… parts are more expensive… there’s many more emissions parts & related sensors… tuning is wayyy more expensive.
L5p is the way to go though if looking to upgraded and to get a newer warranty for all of those parts. So depending on what your do with your trucks, ymmv
Reckless - Very true.
Looking to buy a 16’ LML 170k already tuned/deleted.they had it 4 years no problem super clean. Shop just did some suspension work and checked the fuel system everything was fine but it’s still on the stock cp4
Well the delete is definitely a positive, 170k without CP4 issues is good but certainly wouldn't hurt to reinforce it a bit or replace it given mileage on it.
my lml has 140k. shes deleted and runs like a champ. fingers crossed my truck was built midweek and not on a friday.
E - Thanks for sharing your experience! It sounds like you've got a good one!
Why would you not recommend deleting the entire emissions system if it is going to make your truck that much more reliable?
There is a lot of legal reasons not to do it - really depends where you live and what the emissions testing requirements are. Starting to give out pretty hefty fines to people who get caught with deleted trucks and shops are getting hit hard too so if you can't do it yourself it's difficult to get it done.
If you don’t live in a liberal state do the delete. Plenty shops still do it you just have to go in there and talk.
Boy you dumb dum.
Because TH-cam as well as many other social media outlets, work with the US government to illegally spy on its citizens, thanks to the "Patriot Act", and it only takes one call from a unelected bureaucrat in the EPA to demonetize your account if you suggest, teach, or inform people about things that go against their narrative or their interests... Diesel shops that have TH-cam channels have been shut down and or fined by the tyrants in the EPA for teaching people how to do it or shops that do deletes... if you think that the US is a free country, guess again! Keep voting democrat and soon we will have Soviet and Chinese style gulags!
@@8020Media people just don’t have common sense getting hard to find😂 but thanks man I don’t know either to get a L5 P or lml because I’m a pipeliner and I don’t wanna spend all the money on a truck if I can get the same thing for cheaper lol
Just picked up a lml all stock 80k miles on it
Austin - Nice! Do you have any plans of modding?
So delete it. & Cp3 Swap. Got it lets start saving? What would be the price on all these parts? Im not worried about labor.
T - Pretty much. Here's an article that will help you out with your research: chevytrucks.org/best-duramax-lml-performance-mods/
Does it solve most of the problems by deleting the def system ?
Brayan - Most, yes. Emissions systems, unfortunately, made Duramax's and other diesel engines less reliable.
I’m looking to buy a deisel more for the power and other big truck things , I just put over 300k on my 05 Yukon and wanting a pickup im currently looking at a 2006 duramax with 191k and 2011 duramax with 136k. Definitely hoping to get something just as reliable as my yukon was
LML is good if you delete everything. Otherwise my preference would probably be the LLY - just do the necessary cooling upgrades and make sure it's been taken care of.
@@8020Media thank you so much for replying, preciate it.
W - Keep us updated!
@@8020Media will do.
When replacing cp4 with the cp3 would i have to replace anything else with it or is it a simple remove and replace?
When I changed my 2015 over to a CP3 and doing a delete on it after blowing 2 CP4 pumps with less than 120.000 miles on it ,it required a adaptor kit to install the CP3.but it was well worth the $12,000 ca it cost to do it all.
do you have any opinions on the crankshaft? I'm looking at buying a 2011 LML with 180,000 miles, but I've heard some stories of the crank breaking because of the firing order. is this a common issue?
Definitely not common, I wouldn't worry about the crank unless you are planning a high horsepower build. The crank is known to have issues but not really until you start talking about 700whp+ or big torque numbers
The CP3 also uses diesel to cool it
Mark - What?
If you’re looking for a used lml and you know your going to delete the emissions at what point do these failures start. Or is it best to look at another year range
M - Unfortunately, there isn't a set mileage these tend to fail. But the quicker you delete, the better. We can't recommend this legally, but isn't a bad idea.
I seen a 08 130,xxx miles i have a 97 f150 should i get it?
G - What engine?
What’s the avg life span of one of these motors. Everything I’ve read says 200,000 you say 3-400,000 but I haven’t seen many websites saying that
S - Average is likely 200, but we've seen many in the 300's. It all depends on maintenance.
My 13 has 395k km. Def has been deleted. If you used a fuel lubricant, swap out the factory cp4 for an aftermarket cp4 or do a cp3 conversion, add a lift pump, do an emissions delete, you'll never have an issue. Motor will last forever.
N - Thanks for taking the time to share your experience! Sounds like you've got a nice build.
I plan on upgrading from LWN to LML, it’s already on a diet but is there way I can look and see if it already has a cp3?
Cull - It would be quite difficult to see in the engine bay, but only thing you could do is ask the owner.
I have a 2011 lml and have had it deleted. It is around 430,000 mi and I have not had a cp3 swap;do you recommend a swap and a lift pump?
M - Sounds like you've got a nice build! You don't have to, it just goes down to what your goals are with your truck.
What do guys think of the 2012 lml 6.6 any word in them truck about to buy one buy skeptical if I should go with a ram Cummins or Silverado
I suppose that really depends what you are trying to do with it but more importantly what matters is the condition of the truck and how well it has been maintained. If you're looking at 2012 as a year in general I'd probably get a Cummins but that's just me. That platform had at least been around since 2007.5 and isn't one of the first few years of a new platform like a 2012 LML is, and earlier model 6.7 Powerstrokes are known to be a bit more problematic too, mostly just early kinks from a new engine.
Not to say an LML is a bad choice by any means. Just depends the condition it's in and what you're trying to do with it.
Couple more things TCM failure and electronic fan clutch failure. I also had the low pressure P/S hose come off of the P/S pump. I just got rid of my LML. A money pit!!!
Tim - Thanks for sharing this experience. Can you share what mileage you sold it at and/or when the problems were occuring?
@@8020Media I traded it in about a month ago with just over 112K miles. I have the service records and I can reply back on the mileage when service work was done. Beautiful LML and I was noticing a vibration holding the steering wheel when stopped like the engine was out of balance so I said to myself no way am I paying a shop to tear into this to find the reason. It was maybe 6 months before I had the CP3 changed and took it up the *** for that expense. With no hope on the GM clas action lawsuit I said I am not paying for anything else. Gone!
Got it - Thanks for taking the time to share this! Sorry to hear about your LML. What are you in now?
@@8020Media A crotch rocket 2SS Camaro. Now I find out about GM's dirty secret called AFM/DoD. That crap is coming off and permanently disabled. I'm not replacing lifters or some motor because of it.
Unfortunately, a lot of brands are moving towards it.. Love a nice Camaro!
LML was from 2011-2016, are mid to later years less prone to these "issues"?
D - In our opinion, mid to later years (2013-2016) would be better.
@@8020Media came across a 2015 with 70k miles and am concerned with the cp4 issue
D - The CP4's certainly aren't the most reliable. We think this may be helpful for your research: chevytrucks.org/duramax-lml-engine-problems/
@@dskize1my 15 lml cp4 just crapped out at 230k so i would say the truck is worth buying but be sure to use a fuel lubricant and ride on..repair cost is $12k.. ps..the 9th injector didn’t come with the repair kit so the mechanic bought it separately.
@@tobysmarts thank you very much for your comment. I truly appreciate it!!
I need info on wiring harness
S - What information?
LML is the worst out of the entire bunch. The few problems that they do have, while rare, are all quite catastrophic. Head gaskets, fuel system, and they break more cranks than any duramax before it. Do what I did and skip it for the L5P. Absolutely love mine.
C - L5P's are great for sure. Thanks for sharing your opinions.
You are smoking something. The LML engine is great as long as you take care of the CP4 issue and add a lift pump. I would not trade mine for an L5P. Mine is tuned and deleted and will smoke stock L5Ps all day long.
M - Thanks for sharing your experience.
So you buy a truck. Then have to spend a lot of money to get it to not break but diesel is better than gas?
J - Pretty much nowadays lol. But once they are deleted, they are workhorses.
Looking at a work truck model l
Regular cab king bed truck this weekend for 10,500. Has 280k been D & T and lots of maintenance. Anything I should worry about you think?
Jaxon - If maintenance has been kept up with then those could go for 500k+ miles.
So deleting and new cp3 swap.
J - We can't recommend this, but basically.
Just did a full delete on my 2011 gmc after dealing with def and egr and being stuck in limp mode heading home from seattle , man ol man rooling that cole shure makes my baby scream for joy ....enjoy the government rules poot n nannys
With the tirade the government is on, and as a business, hope you understand we can't go making those recommendations. But we understand the benefits and reasonings for why people do it
@8020Media I also live in north Idaho, a few hours from Canada
Lotta mountains ,Lotta F the government low key lifestyle
It's just how we do things in the 208
Man I'm thankful to be from beautiful coeur d alene
Tyler - Love hearing this XD Thanks for sharing.
Brown Barbara Rodriguez Barbara Martin Brian
B - What?
426 cu in
426 cu in equals liters
426 cu in equals 7.1 lt
Phil - We aren't entirely sure what you're getting at here.
definitely delete the truck. lmao that’s a no brainer
William - We can't advise this, but you are not wrong.
@@8020Media I have an LML with 189k miles emissions still equipped cp4 going strong. run hotshots EDT every tank. but warranty just expired so that’s my next move. Cp3 conversion / Tuned & Deleted.
all about how you maintain the truck.
Sounds like you've got quite the rig! Keep us updated on how this goes.
@@williamthompson4000can I see your rig ?
bl bla bla bla
B - Oh really? What's your opinion?