I bought this exact truck before I saw this cab off repair video. Truck now has 450,000 kms on it towing almost full time. Couple injector pigtails and fuel lift pump issues but nothing too pricey so far
I still have an lbz. My friends bought new 2017 and 2018 Denalis. They are very comfortable and powerful.......when they are on the road. Their trucks have been in the shop repeatedly, sometimes for months! They are now out of warranty and continue to be problematic. The vast majority of failures are dpf related. The costs have been incredible, exceeding $20k for out of warranty repairs. Both friends are considering ordering new 2022 models due their belief that previous problems have been addressed.
I have a friend that started to have dpf issues with his 2017 L5P i have a 2020L5P he only weekend drives his and has i belive 50000 miles, mine has 31000miles no issues, when he started to have dof issues the display on the dash told him he had a certain amount of miles to get to the shop something like that. I told him bring it by my house and hook on to my gooseneck dump trailer go out to the rock quarry and bring me two loads of rocks, now grated he was restricted at 60-65mph if i remember right, and from the quarry up to my house is mostly all hills with large grades needless to say after the second load halfway to my house the code for dpf cleared. This comes to my conclusion that theses trucks cant be babied they have to actually be worked and not road princessed out.
The l5p are one of the best engines built!. Bought my 2019 with 2 miles and now I’m at 187k miles and no problems and still running good on 35s!. Best advice is to keep up with your maintenance and to fully delete the damn truck. The def is bullshit and only hurts the truck, that’s why I removed it because it gets way better mpgs and runs stronger, sounds a whole lot better too!. Any truck is trash if you don’t change the filters and don’t keep up with maintenance. Simple as that!.
Gale Banks was Heavily involved in the development of the LP5 Build along with a Racing background Engineer, I can’t remember the name but Mr. Banks tells it that it’s the best out there right now. Now that being said, I have Owned every Version of GM Diesel Engines since the 6.2 Conversion to the 21 LP5 and I honestly believe this one has the most power along with fuel mileage. I get 24 out of my 21 crew also the 19 not as good but still good, my 14 gets about 21 but is a 3500 HD Crew I use to Haul Equipment around Michigan. Another thing is Bob Cross God Rest His Soul was the Engineer at GM who actually was on the 502 Crate Design also He Himself Created the Heads That NASCAR Required Use. That being said he told me that in Milford GM Proving Grounds they put every after Market System on the Duramax and Could Not Blow one Up at all. You name the Company and GM Tried their Product on the Duramax to try to Blow one up. The only issue ever that I know was Injectors in 2003 and the Turd Fuel Pump the CP4 which is on my 14 which needs converted over but Diesel Pros who does all our Company Repair Shop Burned to the Ground. Luckily for Us and Matt the Owner had good Insurance so they broke ground across the road the very next day so he could get his Customers work completed. He lost Millions of Property along with Nine Bays that all had Trucks in them, lost several in the parking area from intense Heat. A short story long is as soon as he is able the conversion will get done alone with new Head Gaskets or maybe even a New Crate 6.6 who knows.
The 6.6 Motor was being built in Ohio but the Heads are Cast by Isuzu. Then get delivered to GM Plant in Ohio then put together here then shipped to the Truck Plant in Flint where they are put into the trucks. The very best Is the LP5 to date. But the have never had a bad motor, fuel pumps were junk for a while.
Might you share your experience regarding regeneration (DPF cleaning) process of a nineth injector vs. injecting into cylinder on exhaust stroke? I've heard cylinder injection results in oil dilution and cylinder washing....therefore a horrible solution.
Does adding a larger turbo horn or larger intercooler piping help or hurt the L5P engine or just waste of money? There are never any comments out there as to bolt on mods improving the L5P engine efficiency or performance.
9 min and 5 seconds priceless! 666th like wow?! Hey 2018 L5P less than 100k miles trans is shifti.g really hard 3rd to 4th could you point me in he right direction? Please!
So, after listening to your summation of the exhaust manifold issue and the resultant damage, I’d suggest that it would be fair to suggest that the fault is partially a result of the customer driving too far with a leaking exhaust manifold? I have to believe that any manifold suffering that kind of damage (1/4” right?) made noise... My take away from this is that if it sounds wrong it is... take it in and get it fixed! They might have saved themselves a lot of money if they acted promptly. Am I wrong?
Happy new year love your videos. I have a 2019 duramax 6.6 in last year have replaced 5 injectors first 3 twice in 3 months then number 5 twice first injector went then the harness to number 5 . 4 months later now I just replaced number 7. I pull trailers as well I put on 25 to 30 thousand km a month oil and filters done every month at gm dealership here in canada where I'm from. I've also replaced fuel pump as metal shavings started in first 8 months of buying truck. GM doesn't want to solve problem they just replace injectors and hand me the bill I ask why is this continuing all they say is I DON'T KNOW???
Hi, I have a friend with an 18....same story!!!! injectors, glow plugs and now def problems. I have an 06, I dont think I will ever sell it. it is not as nice or as strong the new trucks, but it is alot less problems.
@@davidciesielski8251 I have a 2017 and 05. The 05 way less problems and has 365000miles. The 2017 lives with ck eng lite. Wearing me out at 92000miles.
Great Video, super informative! Any info on a new(less than 200 miles) 2022 6.6 duramax warm engine knock? Dealer states it is normal, all do this because of the new bell housing. It is a super loud thump sounds like a washing machine thump and loud in the cab and in wheel wells/under truck. Mainly at idle. I find it hard to believe this is a normal sound. Any info is appreciated Thanks!
I have 2022 with less than 400 miles that thumps when warmed up. It thumps like 3 times when cold cranked. I’m hoping it’s “normal” and not what it sounds like to me ( broken crank or loose main brg).
I have a 2017 L5p. I have had the injector connector on injector 6 and 4 replaced. I had my mechanic replace all injector connectors on that side. Well it happened again where I had a code for injector 4 happened again. This is getting very frustrating. He is looking at the wiring from the ECM to the connector now. Any insight?
@@dgsprotech985 yes, we finally found that the connection or wiring in the injector was bad. Replaced injector, and everything has been working well since then.
Best thing gm did was get away from the cp4 pump and injectors. The fail rate is astronomical. Look up ford and ram. New Denso pump with screens for safety. Way to go GM!!! And so much more. It’s worth reading about. And they went back to the lml style injectors. Witch is also Denso btw 20% more flow.
@@brittanysnyder9361 Agree on ditching the CP4 but why such a high failure rate on the L5P injectors? Previous injectors (other than LB7) lasted pretty well but they drop like flies on the L5P. Mine dropped an injector at 126k miles. Called my mechanic and he said another 2018 he works on just went through 3, one right after the other.
I have a feeling this is what's going on with my 19 L5P. I smell exhaust when I come to a stop. Def injector started to push too much out and started leaking and corroded exhaust pipe. Dealerships fixed it @ 120k but I'm getting a rattling under driver side when under load or accelerating with a load behind me
I have heard of that too and a lot of people are not happy with GM that’s normal response. GM says it’s the new belt set up. Some thinks it’s the converter. I’m sure eventually someone will figure it out. I’m holding off on buying one till then
Mukie Muk Gives me relief someone else hears this. I just got a 2020 duramax as well and I also have the thumping noise. From what I’ve read and researched it’s normal. Really annoying though especially when you spent 70-80k... lmk how yours holds up man I love mine so far other than the rear main seal has a small leak at 24k miles...
No, actually it's not a GM in house designed engine. It was designed by Dmax Ltd which is a joint venture between GM and Isuzu. You really have no idea what you're talking about., do you?
@@blythkd9017 You are both right. Its not an Isuzu and it is developed in house in Moraine. It is a GM motor based off the previous first gen motor that can be found in first gen duramax trucks(Lb7 RPO code). The only thing that motor has in common with an Isuzu is the displacement. It has been entirely re-purposed by GM specifically for the Silverado line. By the way, GM is the primary owner of DMAX. They are a division of GM. Sort of like how Corvette is a division of GM.
Best way to avoid L5P issues is to not buy one right now.....Chevy has done some weird stuff which he explains perfectly, but that exhaust right over the heads,...ouch.
You need to do more research on the Duramax. It is not an Isuzu motor. The L5P has had hardware changes.. please educate yourself better on engines. It would be like me calling the powerstroke in New fords an international designed motor.
Not quite the same thing. The new Powerstroke is all Ford, nothing to do with Navistar. Duramax is a joint venture between GM and Isuzu, always has been.
You are the one that needs to educate yourself. The GM Duramax engine plant, otherwise known as GM DMAX Ltd. or GM Moraine Engine Plant, is located in Moraine, Ohio, United States. The plant is a joint venture between General Motors and Isuzu Diesel Services of America, with 60 percent belonging to GM and 40 percent to Isuzu. The facility produces large diesel engines.
@@HyperXism Give it up, T Rob obviously knows it all. You ever notice when people like that plant their feet in the mud and jump up and down like they know something better than everyone else, they're usually completely wrong but won't ever back up. But you're exactly right, Isuzu still owns a chunk of Dmax Ltd. So although calling it Isuzu may not be technically correct, it still make sense if that's what someone prefers to call it. I mean GM couldn't design a good diesel back in the 90's, that's why they enlisted Isuzu to drive the design effort.
![ลองสั่งของจากแอพ temu ถูกจริงหรอ?? ( part : 1/2 ) [โกงไหมครับ ep.89 ] | DOM](http://i.ytimg.com/vi/RTcZSQTiDZw/mqdefault.jpg)
I have never commented on a TH-cam video, but this video is exceptional. I am very impressed with the knowledge of the presenter. Well done!
I said the same thing, how the .... man this dude should be on my friends list.
Easily impressed I take it
hey! Thanks for the comment then, it's great to hear from you. Let us know some other topics and we can add them to our inspiration list.
Agreee up to date well educated 100%
Very informative and this guy sounds very knowledgeable. Keep up with the videos!
Thx for the support
I bought this exact truck before I saw this cab off repair video. Truck now has 450,000 kms on it towing almost full time. Couple injector pigtails and fuel lift pump issues but nothing too pricey so far
That's great to hear!
Very nice and professional explanation!!!
Glad you liked it!
I still have an lbz. My friends bought new 2017 and 2018 Denalis. They are very comfortable and powerful.......when they are on the road. Their trucks have been in the shop repeatedly, sometimes for months! They are now out of warranty and continue to be problematic. The vast majority of failures are dpf related. The costs have been incredible, exceeding $20k for out of warranty repairs. Both friends are considering ordering new 2022 models due their belief that previous problems have been addressed.
I wish u made videos everyday i’d watch them all, thanks keep em coming!!
appreciate the feedback! Give us a follow on facebook, we release content more often there.
I have a friend that started to have dpf issues with his 2017 L5P i have a 2020L5P he only weekend drives his and has i belive 50000 miles, mine has 31000miles no issues, when he started to have dof issues the display on the dash told him he had a certain amount of miles to get to the shop something like that. I told him bring it by my house and hook on to my gooseneck dump trailer go out to the rock quarry and bring me two loads of rocks, now grated he was restricted at 60-65mph if i remember right, and from the quarry up to my house is mostly all hills with large grades needless to say after the second load halfway to my house the code for dpf cleared. This comes to my conclusion that theses trucks cant be babied they have to actually be worked and not road princessed out.
Can you make a video about maintaining an L5P?
We will add it to the list!
The l5p are one of the best engines built!. Bought my 2019 with 2 miles and now I’m at 187k miles and no problems and still running good on 35s!. Best advice is to keep up with your maintenance and to fully delete the damn truck. The def is bullshit and only hurts the truck, that’s why I removed it because it gets way better mpgs and runs stronger, sounds a whole lot better too!. Any truck is trash if you don’t change the filters and don’t keep up with maintenance. Simple as that!.
What size did you get to fit those 35s and did you need to trim for rubbing?
Do you use any additives? Factory oil? Congrats on maintaining the truck btw
17 duramax had to replace the def tank due to heater sensor failure and also glow plugs 74k miles
Great video! You are not that far from Rich at DeBoss Garage. Nice to see more good content from fellow Canadians.
Thanks for the comment! It helps us a lot.
Great information to know on my truck
Have you heard the thump, knocking that the l5p does, do you know what it is, chevy says this is a normal sound?
Gale Banks was Heavily involved in the development of the LP5 Build along with a Racing background Engineer, I can’t remember the name but Mr. Banks tells it that it’s the best out there right now. Now that being said, I have Owned every Version of GM Diesel Engines since the 6.2 Conversion to the 21 LP5 and I honestly believe this one has the most power along with fuel mileage. I get 24 out of my 21 crew also the 19 not as good but still good, my 14 gets about 21 but is a 3500 HD Crew I use to Haul Equipment around Michigan. Another thing is Bob Cross God Rest His Soul was the Engineer at GM who actually was on the 502 Crate Design also He Himself Created the Heads That NASCAR Required Use. That being said he told me that in Milford GM Proving Grounds they put every after Market System on the Duramax and Could Not Blow one Up at all. You name the Company and GM Tried their Product on the Duramax to try to Blow one up. The only issue ever that I know was Injectors in 2003 and the Turd Fuel Pump the CP4 which is on my 14 which needs converted over but Diesel Pros who does all our Company Repair Shop Burned to the Ground. Luckily for Us and Matt the Owner had good Insurance so they broke ground across the road the very next day so he could get his Customers work completed. He lost Millions of Property along with Nine Bays that all had Trucks in them, lost several in the parking area from intense Heat. A short story long is as soon as he is able the conversion will get done alone with new Head Gaskets or maybe even a New Crate 6.6 who knows.
OUTSTANDING INFO!!
no problem! Check us out on facebook and ig for more consistent content
Great video! I just purchased a 2019 L5P so exciting, it will be a road queen but so what love diesels. Thanks so much for the info!!!
much better option than the Ford....still running CP4 oops.
Just hit 20k on ours at home its awesome man 2019 silverado L5p she gets down
I see you driving the 6.7 powerstroke I also crossed over to the dark side
Thanks for the info
The 6.6 Motor was being built in Ohio but the Heads are Cast by Isuzu. Then get delivered to GM Plant in Ohio then put together here then shipped to the Truck Plant in Flint where they are put into the trucks. The very best Is the LP5 to date. But the have never had a bad motor, fuel pumps were junk for a while.
Very informative sir. Thank you 👍🏻
no problem! thanks for the comment, it helps us a lot
Would you say in your honest opinion that the L5P is a solid platform?
Most solid Duramax we've ever seen
Great video.
thanks!
awesome info love your videos
Thanks!
Might you share your experience regarding regeneration (DPF cleaning) process of a nineth injector vs. injecting into cylinder on exhaust stroke? I've heard cylinder injection results in oil dilution and cylinder washing....therefore a horrible solution.
Do this still have the alignment pins on the crankshaft that shear off
Does adding a larger turbo horn or larger intercooler piping help or hurt the L5P engine or just waste of money? There are never any comments out there as to bolt on mods improving the L5P engine efficiency or performance.
the intake tube is a great add on to this engine - removes a choke point
Yes Sir , i would like to know the cost for that repair. Thanks
give us a call at 519-418-2886 and one of our advisors can help you out.
Nice video!!
9 min and 5 seconds priceless!
666th like wow?!
Hey 2018 L5P less than 100k miles trans is shifti.g really hard 3rd to 4th could you point me in he right direction? Please!
hey man! we would love to help, give us a call at 519-418-2886
Can you do a crankshaft sensor without removing the starter?
Hint.. why clogging of MAP!?
I have a 2019 3500 L5P, how do you keep that from happening?.
So, after listening to your summation of the exhaust manifold issue and the resultant damage, I’d suggest that it would be fair to suggest that the fault is partially a result of the customer driving too far with a leaking exhaust manifold? I have to believe that any manifold suffering that kind of damage (1/4” right?) made noise... My take away from this is that if it sounds wrong it is... take it in and get it fixed!
They might have saved themselves a lot of money if they acted promptly.
Am I wrong?
I m doing my Injectors on my 2017 l5p
I'm looking at the Autel 808BT 608ts scan tool! Any Recommendations?Thanks!
Happy new year love your videos. I have a 2019 duramax 6.6 in last year have replaced 5 injectors first 3 twice in 3 months then number 5 twice first injector went then the harness to number 5 . 4 months later now I just replaced number 7. I pull trailers as well I put on 25 to 30 thousand km a month oil and filters done every month at gm dealership here in canada where I'm from. I've also replaced fuel pump as metal shavings started in first 8 months of buying truck. GM doesn't want to solve problem they just replace injectors and hand me the bill I ask why is this continuing all they say is I DON'T KNOW???
Hi, I have a friend with an 18....same story!!!! injectors, glow plugs and now def problems. I have an 06, I dont think I will ever sell it. it is not as nice or as strong the new trucks, but it is alot less problems.
@@davidciesielski8251 I have a 2017 and 05. The 05 way less problems and has 365000miles. The 2017 lives with ck eng lite. Wearing me out at 92000miles.
What scan tool did you use to code your injectors?Thanks!
@@CrownRoyal144 GM diagnosed with their scan tool
Great Video, super informative! Any info on a new(less than 200 miles) 2022 6.6 duramax warm engine knock? Dealer states it is normal, all do this because of the new bell housing. It is a super loud thump sounds like a washing machine thump and loud in the cab and in wheel wells/under truck. Mainly at idle. I find it hard to believe this is a normal sound. Any info is appreciated Thanks!
I have 2022 with less than 400 miles that thumps when warmed up. It thumps like 3 times when cold cranked. I’m hoping it’s “normal” and not what it sounds like to me ( broken crank or loose main brg).
I have a 2017 L5p. I have had the injector connector on injector 6 and 4 replaced. I had my mechanic replace all injector connectors on that side. Well it happened again where I had a code for injector 4 happened again. This is getting very frustrating. He is looking at the wiring from the ECM to the connector now. Any insight?
were the replacement injectors programmed with the calibrations properly ?
@@dgsprotech985 yes, we finally found that the connection or wiring in the injector was bad. Replaced injector, and everything has been working well since then.
Did you have to replace the DPF? If so did you use OEM or Aftermarket?
5” straight pipe
not on this truck, but on others we have. We have both new OEM and new Aftermarket - plus cleaning options
Having problems with my acurator valve
hey! If it is still bothering you, give us a call at 519-418-2886 and we can try and help yea out.
Any advice is much appreciated thanks
:) Feel free to give us a follow on facebook for more content.
is it safe to say that L5P is the most reliable engine. Injectors cheap and HP is cheap comparing to Bosch.
It really depends on the failure, also the aftermarket allow for more reasonable priced parts as l5p is gm only on lots of items as of now
Best thing gm did was get away from the cp4 pump and injectors. The fail rate is astronomical. Look up ford and ram. New Denso pump with screens for safety. Way to go GM!!! And so much more. It’s worth reading about. And they went back to the lml style injectors. Witch is also Denso btw 20% more flow.
@@brittanysnyder9361 Agree on ditching the CP4 but why such a high failure rate on the L5P injectors? Previous injectors (other than LB7) lasted pretty well but they drop like flies on the L5P. Mine dropped an injector at 126k miles. Called my mechanic and he said another 2018 he works on just went through 3, one right after the other.
I got an L5P, exhaust system will be “replaced” soon 😝😝
mine too hahah
get a banks Derringer, cold air intake, exhaust and keep your warranty. +98 horsepower and 100+ torque
@@nicklovely6431 gay
@@nicklovely6431 those retain warranty? Even when deleted?
New subscriber here!!
thanks for the follow!
This was filmed on a Panasonic camera wasn’t it? I know that focus flutter ….
Great video though.
lol
How many hours to get the cab off of the frame.....and to put it all back together??
2-3 off 2-3 back on
This guy looks like Ryan Reynolds
:D
I have a 2020 2500hd duramax. Turn steering to right hear and feel Hydraulic grone . Any thoughts
I would suggest a diagnose locally, that could be a steering gear (box) issue or something simpler
Just saw a post from gm authorities saying that gm is gonna buy costumer truck with Lp5. Is that true???
individual basis im sure
Would your recommend ppe exhaust kit and down pipe. It help lower egt?
always on any duramax, great product
200,000 miles or KM?
He said miles
This truck had 200k kilometers
Y'all do warranty work?
depends on the type. give us a call and we can look into it for you.
Do you have any advice on replacing the desno fuel pump?
im regard to the steps or ?
I have a feeling this is what's going on with my 19 L5P. I smell exhaust when I come to a stop. Def injector started to push too much out and started leaking and corroded exhaust pipe. Dealerships fixed it @ 120k but I'm getting a rattling under driver side when under load or accelerating with a load behind me
I thought I was the only one that heard that rattling noise did you ever figure out what it was
@@SlaywithNiya5678 dealership put the exhaust on wrong. Took it to a local shop and they fixed the growl/ rattling noise.
Kenny Parker ok thank you boss man
The L5P is all GM
Would an audible turbo whistle be present when this occurs?
The noise would be exhaust leak hiss (sounds similar to turbo whistle)
@@dgsprotech985 ok thank you. I experience a whistle that varies with throttle on highway. I dont believe its exhaust.
Will you do the LM2 Duramax?
do what to them? - we do work on them yes
@@dgsprotech985 a video on the issues commonly seen.
What a nightmare
all in a days work
Does 2021 GMC 3500 Come with an Lp5?
Yes
Silverado and sierra 3500hd are basically the same thing just different front and back
How much time taking cab off?
3-4 hours
Any ideas on the 2020 L5P thumping noise at idle?
Apparently it is normal. I have the same noise.
I have heard of that too and a lot of people are not happy with GM that’s normal response. GM says it’s the new belt set up. Some thinks it’s the converter. I’m sure eventually someone will figure it out. I’m holding off on buying one till then
Mukie Muk Gives me relief someone else hears this. I just got a 2020 duramax as well and I also have the thumping noise. From what I’ve read and researched it’s normal. Really annoying though especially when you spent 70-80k... lmk how yours holds up man I love mine so far other than the rear main seal has a small leak at 24k miles...
Would really need to hear it
DG's Pro Tech Is the thumping noise common and have you heard of it?
What did that repair cost?
hey! for any pricing information give us a call at 519-418-2886
It is not an Isuzu engine. The L5P is a GM in house designed engine. It’s a similar design to the old style duramax’s but it is not an Isuzu engine.
No, actually it's not a GM in house designed engine. It was designed by Dmax Ltd which is a joint venture between GM and Isuzu. You really have no idea what you're talking about., do you?
@@blythkd9017 You are both right. Its not an Isuzu and it is developed in house in Moraine. It is a GM motor based off the previous first gen motor that can be found in first gen duramax trucks(Lb7 RPO code). The only thing that motor has in common with an Isuzu is the displacement. It has been entirely re-purposed by GM specifically for the Silverado line. By the way, GM is the primary owner of DMAX. They are a division of GM. Sort of like how Corvette is a division of GM.
Best way to avoid L5P issues is to not buy one right now.....Chevy has done some weird stuff which he explains perfectly, but that exhaust right over the heads,...ouch.
You would be the guy to go to.
thanks man! appreciate it
9 injectors 😜 hci
You need to do more research on the Duramax. It is not an Isuzu motor. The L5P has had hardware changes.. please educate yourself better on engines. It would be like me calling the powerstroke in New fords an international designed motor.
Not quite the same thing. The new Powerstroke is all Ford, nothing to do with Navistar. Duramax is a joint venture between GM and Isuzu, always has been.
@@blythkd9017 Isuzu has had nothing to do with for quite awhile.
@@Predator50088 So who builds the Duramax engine?
You are the one that needs to educate yourself. The GM Duramax engine plant, otherwise known as GM DMAX Ltd. or GM Moraine Engine Plant, is located in Moraine, Ohio, United States. The plant is a joint venture between General Motors and Isuzu Diesel Services of America, with 60 percent belonging to GM and 40 percent to Isuzu. The facility produces large diesel engines.
@@HyperXism Give it up, T Rob obviously knows it all. You ever notice when people like that plant their feet in the mud and jump up and down like they know something better than everyone else, they're usually completely wrong but won't ever back up.
But you're exactly right, Isuzu still owns a chunk of Dmax Ltd. So although calling it Isuzu may not be technically correct, it still make sense if that's what someone prefers to call it. I mean GM couldn't design a good diesel back in the 90's, that's why they enlisted Isuzu to drive the design effort.
It's been a whale
thanks for the comment tyler! Trying to get back to our TH-cam family, check us out on Facebook for regular posts.