Breaking Down This HUGE L5P MYTH About GLOW PLUGS (Please Don't Do This To Your L5P!)
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- Опубліковано 9 січ 2021
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Great video man, love the L5P content. I literally had 7 glow plugs replaced from the factory over the course of the first year I had mine. 2017 L5P. Dealer gave me an extra 10,000 mile warranty over the standard 100k.
Good video man! Glad you did this... I’ve been seeing so much hype of deleting these. Seems so much easier and cheaper to just replace as soon as you throw a code! Keep it up
Love the truck. But now we need a proper next morning cold start to see if it’s really working.
Ya just to see if it works.
I agree. p1338 DTC after remote start first time today. 66k miles on my truck.
My theory is always buy the best parts you can find when working on stuff because your time is the most expensive part of the job and you don’t want to do it twice!
I have a 2021 and my father has a 2020 ( 2500 ) Duramax high country Silverado. I have to say haven’t had glow plug problems he 20k & 13k miles on mine. Fingers crossed Haven’t had any issues yet
Good advice on sticking with ac delco parts but why not just replace all of them at once.
Serious question because I need to do my glows plugs on my 2017 . Are there better aftermarket glow plugs ? I’m not looking to cheap out , I will pay more . If factory AC Delco glow plugs are the plugs that they use stock and they are known to be defective how does replacing them with the same thing do me any good ? They are the same plugs I’m putting back in ? Did they fix the problem with the replacements I will get from AC Delco ? I’m not a mechanic and I don’t want to have to keep replacing them . Any insight to my question would be appreciated. Thx
I had 3 glow plugs replaced prior to 22k miles on my 2017. They also did an updated ecm flash in regards to changing the voltage perimeters to the plugs.
Hey man, thanks for the info on the firing order ! My #5 is bad and there is no info on the internet about this!
The local Chevy dealer replaced 2 of my glow plugs under warranty. Cylinders 3 & 7 were reading high resistance so those were the only ones they replaced. I thought I was getting all 8 replaced but the bulletin does not allow that. The letter sent to me says they will cover replacing bad glow plugs on the 2018 model L5P up to 150,000 miles.
Yes I completely get your point on this, the guys that are actually deleting these glow plugs for the fact of making more horsepower, they are seeing these plugs drop into the cylinder, I deleted mine already due to the fact that I am shooting for high horse power. I just installed the s400 kit, I’m here in wi and the truck starts perfectly fine at 0 degrees
I been lucky with my 09 LMM, this winter I had 3 stopped working,so I just plugged the heater in, so soon as it warms up here in northern Ohio Im replacing all of them with GM OEM from Amazon
So does the new glow plug need to be programed? From this video it appears thats not true but have seen lots of info online stating it does. I have a 2020 Chevy 2500hd l5p.
Nice video! How do I use the relearn feature after the glo plug replacement?
I replaced all 8 of mine on my lml when one went bad at 60K. No point in just replacing one when another will go soon after. I’ve read on Facebook duramax forums about the plugs snapping off, but 1/2 the time the truck were in the salt regions & the engine areas where completely shitted up with rust & corrosion. Also put anti-seize on the threads, it’ll help you when removing the plug.
You're one heck of a guy! Thanks for the knowledge on the ol' L5P!!
Awesome content brother love the channel as well nice job Denny
Great video. One breath you mention that these glow plugs are not good. They should probably be recalled since they keep failing at rapid rate. Next breath, mention how we should always replace with high quality oem parts, and get the same factory glow plugs. Is there not an upgraded higher quality plug available?
I just replaced my #6 glow plug on my 07 LMM because of a code. I bought ACDelco but the guy at OReilley said his diesel guys tell him the way to not have problems is to use Bosch (at 2.5 times the cost). I believe my issue was corrosion on the power wire because the nut spun without coming off and was quite rusty. Had to break the stud off to remove it. Used a stainless washer and nut on the new gp
The ac Delco/gm glow plugs are BERU made in GERMANY. A lot of guys are getting counterfeit garbage online. I’ve seen it first hand. The genuine plugs are great. Output wise the GM BERU are the best. But to each their own.
As gm parts technician i know those plugs are extremely fragile, if we drop one it goes in the garbage because its no good.
Good content, thanks for taking the time to do these.
Honestly if it's factory it has to come out not being bias of anything but whenever is on it when it rolls off the line is only going to be as good as the price tag so it would be a good idea to get that stuff out of it
How do you warm the glow plugs on the new trucks with a push button starts?
What is the fix for the glow plugs that keeps blowing? Even after replacing with A/C Delco.
Just like they did with the injectors with the LB7.
Brand new ac Delco broke the tip off on first start
The manual says to ream the glow plug tip bore prior to installing the new glow plug, as the carbon build up can cause the ceramic tip to get pushed off center while installing it and wha-la tip breaks off
Thanks for the great information and let us know the cylinder numbers so we know wish glow plug to replace and you just got a new subscriber.
I just was a the dealer a hour ago. My number 2 glow plug is bad. There fixing it tomorrow under the power train warranty no questions asked its a 18 with 80000 miles
Having the same issue myself. Was wondering if my warranty would cover it. Appreciate the input
The #2 glow plug is out also on my 2018 and I have an appointment Tuesday. I'm going to ask for the old glow plug to make sure they replaced it
The #2 glow plug was replaced with no question ask. We have an extended warranty up to 150k.
@@Maricatlover Glow plugs are not covered by GM extended warranty.
It was covered
I have 2019 GMC, GM sent a letter about the glow plugs, "an unresolvable issue with glow plugs in the L5P generation of diesel engines", and did something like a 14 year warranty on the glow plugs. I've only had one replaced so far at 32,000 miles (coincidentally the turbocharger died at the same time).
Just like every other car brand there some lemon cars, lucky my truck wasn’t a lemon within the first 94k miles, bought my 2020 Silverado 2500hd and put 94k miles in 2 years this thing is a beauty mechanically.
I was under the impression that modern diesel glow plugs aren’t just for cold starts but can effect the warm running of these new engine designs vs the old school stuff.
That video helped me a lot man thanks what tune and exhaust do you have on your truck
I have a 17' Duramax Denali just got the P0671
I've got 400,000 Miles on my 2019 durmax.. All original glow plugs, Popped a code last week for number 3 glow plug being out of parameter. Going to buy all 8 today and put them in, Just in case
Denny do have the part number to that glow plug on the L5P? Thanks
Could you please explain how the glow plugs actually work on the 2020
Duramax I live in Minnesota my remote starts truck right away no mater how cold
They heat up real quick within 5-6 seconds and pre heat the cylinders
Thanks
Love all the content bro! Def and egr delete is my dream for my l5p. You had any issues with your cameras working on any of the trucks? My camera systems stopped working and I cant figure out a fix for it. If anyone got a fix or the same issue let me know.
I saw no mention of using Never Seize or similar on the GP threads. Also, having a comparison of new vs old GP's .. It looked from video like the tips of the old plug wore off/down
I have a 2017 duramax and have replaced all my glowplugs on it and a month later I already have a code coming up. I replaced all the glowplugs with Acdelco. Any suggestions what else could be going on?
Did you get it resolved? There is a module update to assist with burning them up so fast.
I'm having this issue with my 3.0 Duramax. I've reset it twice!!
Hey Denny great video! I’m looking to replace glow plug number one. And I was just wondering if there’s a need to “relearn” the glow plug?
Nosir just replace
@@DennyDiesel great! Thanks man
I recently purchased a 2021GMC 2500 Denali and the L5P is my first diesel. Any suggestions for someone brand new to diesels? Nonetheless, appreciate the videos. Please keep them coming.
Was thinking about doing this, but will leave intact. Still need to get my block heater recall done. I wonder if they will sell the parts so I can do myself? I heard the way they bleed the system is run the dog shit out of it in park for several minutes, not sure if that’s true or not?
Plus I don’t want them hooking into my ecm trying to do the dpf recall lol nothing there!
Best bet is to go there and see if they will just give you the parts under the recall to do yourself. My local dealer did that for me but there pretty cool. Guess it just all depends on where you go
You Getting any random missfires?
Wonder if NGK makes an upgrade glowplug?
Just got a check engine on my 17 l5p. The codes were P06C5 and P0671. Im guessing its the cylinder 1 glowplug. How long can i drive with a bad glowplug or should i replace it and not drive the truck at all. New to diesels lol.
Good video but you forgot to put Anti-seize on the threads Of the glow plug
Not really my cup of tea for those when the engine is hot they back out super easy warmed up my lbz that has 400k miles and the one I was replacing came out like cake
Never seems to trigger the glowplug code unless its a cold start where they really heat up. I didn’t realize the l5p had the issue with the glowplugs. My dad has a denali l5p too so now we know lol. That’d be so dumb to delete glow plugs. Lol
What was the code that your truck through when you replace the glow plug? Mine keeps throwing a glow plug offset and all they do is update and remove code.
What has been done to that truck? Suspension tires etc?
what is your view on pcv hose deleting?? venting to atmosphere?
100% do that ASAP
@@DennyDiesel what is the best way to do it? kits anywhere or just a hose and connector?
Shoot me a email with your address I’ll mail you one dennydiesel@yahoo.com
Lets say Im in the middle of a trip pulling my 5th wheel and a glow plug codes goes off? Will your truck go into limp mode if have not immediately taken care of this?
No
Great videos. I appreciate every one of your videos that I’ve seen so far.
Based on your experiences with the L5P platform do you have any regrets on purchasing one and would you buy another one over any of the big “3” heavy duty trucks?
do you need to go to the dealer to get the glow plug learned once installed? @denny Diesel
How do you tell witch one is the one that is bad we’re can I look up the code meaning
How many of these failures were due to not heating the block?
Is there a brand which is superior to GM glow plugs?
whe is it for sale.. i wanna buy
I’ve owned many diesels and switched to a gasser.. missing the towing power with a diesel. Would you recommend an L5P as a daily driver/tow vehicle? I’ve had another diesel shop owner suggest the L5P is actually a pretty stout build in regards to GM. He went as far to say as reliable as an LBZ. 😳
Do you need to re-flash or
re-learn the glow plug after replacing?
Nosir
What is the codes for a glow plug ?
Did I miss the code? What is the code? Is it P133E?
i go through plugs like crazy
Might be. A dumb question but I need my #6 cylinder replaced on my 17 the dealership already did it once and I took it apart now to do it myself when I reinstall the new one does it need to be relearned to the gpcm? I saw online someone said it did? I was just gonna delete the code after installing and hope that fixed it my code is p133d
Hello mine just through that exact code. Can I ask if you replaced the glow plug and if it fixed the code? Also what part number for the glow plug if you did? Thanks
@@whoopassracing hi yes I just went to the stealership and got one and replaced it myself and it fixed it the code never came back…I can get you the part number in the morning when I go to the shop!!
Is that WCfab red under the hood?
Yes
This video go help lot l5p owners
Do I have to worry about my 18 duramax glow plug if it is stock?
Same here I recently got a letter for glow plug issues for 2019 L5p but then again I live in Dallas where it’s hot af and I had no issues when Dallas froze back in February
@@chevyboyzz4996 got the letter too mines a 2019 with like 25k bearly hopefully no issues with plugs to come
@@mondo9.2.5 I mean shouldn’t be that bad I’m still under power train warranty till I get to 100,000 miles and the recall letter says GM should replace no charge
Nice video. A little common sense goes a long way.
Hard to find that nowadays lol
I probably am going to delete my glow plugs. I’m in California always
So the factory L5P glow plugs are a peace of sh-t, and you want everyone then go out and buy the same glow plugs that you are now calling the best glow plugs??????? I have a 1996 GMC truck with the 4.3l V6 engine, no telling how many OEM injectors I had replaced the first 4 years of its life. I would not sell it because I did not want to stick someone else with the problem. I even went so far as buying tow insurance to make sure it would be brought home. I would not drive it more than 55 miles from home. I think it has only 134,000 miles on it today. What solved my problem was buying a after market complete injector spider with 6 aftermarket injectors. Have not had to change a injector for the past 80,000 miles. GM knew they had injector problems with that year truck engine and just kepted replacing them with the same injectors. The complete aftermarket spider and 6 injectors cost less than 2 OEM injectors. How many times does the aftermarket companies have to slove the manufacture's screw up's??????????? Time and time again.
If there was a better aftermarket market one I would say buy it but there’s no better options It’s a $40 dollar part it’s not that serious
I say just let it nuke the motor. Enough of these happen and GM with have to do something about it
Good idea, then u can be happy that you destroyed your ride but perhaps for a good cause !!
“Stock” 700 or 800hp yeah okay lol
In stock application or if you’re in the 700-800hp range
I've heard L5Ps are garbage. Stop messing with duramax and get a 6.7 powerstroke that are better admit it !
Stop listening to everything you hear online lmao
@@DennyDiesel damn I guess the online stuff be messing with my head lol. #L5Pftw I own a 6.7 but there junk too 🤦♂️ although I have seen many GM consumers complaining about injector problems on there 2020. They even say GM is junk and that they are looking into Ford super dutys 🤷♂️... might not be your 17 through 19s but anything over that is garbage. Facts only. Plus your duramax is build by a Japanese company named Isuzu no denying me there. The 6.7 is all in house built. Yeah ford said goodbye to Navistar that made them look bad in the first place. I have a 2jz motor sitting in my MK3 Supra built by a Japanese company. Wonders why the duramax are built somewhat so well lol.
How many of these failures were due to not heating the block?
Most of these trucks are used for hauling. How tf does gm expect people to plug these damn block heaters in when your at truck stop or rest area in the middle of nowhere during the winter?