Chevy Silverado 1500 3.0 Duramax Diesel **HEAVY DIESEL Mechanic Reviews** | Is It a GOOD Engine??
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- เผยแพร่เมื่อ 31 พ.ค. 2024
- Is the Chevrolet Silverado 1500/GMC Sierra 1500 3.0L LM2 Duramax Diesel a good reliable diesel engine? I give you my professional opinion as a heavy duty diesel mechanic and review this smaller 3 liter Duramax Engine. I go over the basic mechanic components and some known issues giving you guys my thoughts and overall this seems like a good engine!
I hope you guys are having a wonderful weekend! I thought it was about time I ventured down this path because a couple of you guys have been wanting me to review the 3L Duramax diesel engine in the GMC products like the sierra and Silverado 1500. but these diesel engines are also in the larger SUVs like the suburban.
So this engine has some great features right off the bat. I love the fact that it is an inline 6 engine and not a v6 engine. this makes a great diesel engine and I explain the simple mechanical advantages of an inline 6 engine in the video. I also like that this engine is basically a smaller big truck engine. inline 6 with a single turbo with dual overhead cams is a tried and truth engine design. good to see GM not trying to re-invent the wheel and simply making something reliable.
I don't really like that the block and heads are aluminum but seeing that this diesel engine is in a 1500 it can't be crazy heavy on the front end so I can live with that.
the major thing that caught my eye was that the gear train was at the rear of then engine. there is nothing wrong or weak about this design it just makes for some tough maintenance and sometimes hard to service certain parts. most American made diesel engines put their gear train on the front of the engine to make it easier for service as we usually have hoods that open up in the front.
my hunch is that these 3L diesel engines are going to be sold in the Asian and European markets with their trucks being mostly cab over units thus making these engines easy to service. but not here in north America.
because the gear train is on the rear there is the issues of the oil pump belt. in order to service and inspect this part. the transmission has to be removed which is a huge pain.
00:00 - LM2 3.0 Duramax Diesel
01:03 - Duramax Specs
02:20 - Duramax Engine Components Overview
04:51 - Diesel Inline-6 Engine Advantages
06:09 - 3.0 Duramax Rear Gear Train caution
09:43 - Duramax Long Crank Time/No Start
11:20 - Oil Pump Belt Replacement/inspection Issues
11:53 - Rear Main Seal Issues
12:53 - Injector Issues
14:43 - Fuel Pump Replacement Issues
15:36 - No Emission Related Issues
17:00 - My Conclusion on this Duramax Engine
but other then that I really like the mechanical design of the engine.
Issues
1. Long crank times
- this is the biggest issues these engines face by far. and GM has not really had a good fix for them yet. what usaully fixes of the issues most of the time is replacing the cam shaft position wheel. but to do this job it is very labour intensive and involved removing the whole cab off the frame.
2. the oil pump belt needing transmission to be removed to service it
3. rear main seal leaking
4. injector tips becoming carboned up
5. fuel pump replacement being pre-mature and difficult.
the silver lining is that this modern diesel engine (Duramax LM2) has had little to no emission related component failures or faults which is actually amazing and very impressive from GM
so overall I really like this engine and I do think this could be a very strong running long lasting reliable Duramax diesel engine for these Chevy and GMC trucks! - ยานยนต์และพาหนะ
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My understanding is that they finally figured out how to mitigate the long start issue for the LM2 without needing to replace the CPS exciter wheel. Basically, the issue was that the ECU just gave up if it got a single invalid CPS reading during the startup interval (which was short). My layman's understanding of the fix was to add a few extra rotations to the startup interval and sample more than once. That apparently has fixed it permanently for nearly all situations where the wheel was the problem. (The underlying supplier issue was fixed for LZ0.)
Ecu flash fixed mine, it pauses the start procedure for about .5 seconds to allow multiple sensor pulses for the start sequence. Never had the problem since.
Good to know! I guess my info is old. I'll pin this comment so other can see!
@@cjwright1960 It pauses the start process lol how convient.
@@foch3 yeah an unflashed ecu will start cranking immediately and engine star happens very quickly when you press start, a flashed ecu will have about a half second delay before it starts cranking, and the cranking cycle will last about a half second longer.
The engineer details those changes here: th-cam.com/video/J7KM5-oMLm8/w-d-xo.html
I bought 2 of them. One in an Escalade and another in a GMC Denali. I love the 3.0 Duramax. I have had zero issues. Best fuel mpg to power ratio I have ever owned. I love the low end grunt too. Awesome job GM!!!
Happy you are liking the engine!
What is a GMC Denali? That’s a trim level, not a model.
@@RB-xv4si Sierra. Why would he buy two of (basically) the same vehicle.
@@RB-xv4si GMC Sierra Denali
@@RB-xv4si I get it…
My 2022 3.0 has 15k on it. So far, I love it. The 10 speed transmission is extremely smooth, and the engine has great power for a 1/2 ton.
I have owned my RST 3.0 Duramax for a year now and I love it. Great fuel economy and plenty of power. Paired with the new 10 speed automatic transmission, it always seems to be in the proper gear. If you do not expect it to be something its not, you will be very happy with this engine. Very happy with GM's offering with this engine/transmission combo.
Exactly my impression as well. I think it’s the best combo GM has out right now. Who doesn’t live 30 Mpg + and that low end grunt! I love it in my Escalade ESV and my Denali Sierra.
I have a 2020 Chevy 1500 RST with the 3.0. Towing on the east coast with a 5500 lb rv 17.0 mpg. Driving around town/hwy 28-31. A full tank of fuel has a 700 mile range. My old truck a 2010 GMC Sierra 5.3, 17mpg was the around town and towing the same rv 9
mpg. Its quiet, rides really smooth. No problems even in cold weather. GM just extended the oil pump belt to 200,000 miles, and who knows in the 15 years it takes for me to put 200,000 miles they might bump it up to 250.000. Great engine and transmission(10 speed).
I've got a 2020 AT4 with the "Mini Max". I've put 57k hard miles on it without issue including living in NE Wisconsin where it sees a legit winter and hauling a 2k lb truck camper all over out west during 100deg heat up and down mountains. Great engine and great MPG. Very smooth power and hauls with relative ease.
Good to hear. GM updated the 3.0 and addressed some issues. GM is lone arbiter of a small diesel. Ford and Ram backed out. Why go hybrid when you can have a diesel? They’ll sell every one they make.
Cool too hear some thanks for the info just purchase one 👍
What kind of MPG do you usually get when empty?
Great video and thanks for all your amazing insights. It really helped me learn more about the 3.0 Duramax.
Put 56,000 miles on my first with only the long crank issue. Amazing engine. I’d typically see 29-31 MPG in highway driving. I just bought a 22 and currently have a order in for a Yukon to replace my wife’s Expedition.
i want one the mpg is insane!!! love it
Y’all got more disposable income than I. I’ll just continue driving my golf.
This has been THE best overview of this engine! Well done!
He has no idea what he's talking about. He never even saw one of this engines
Congratulations Alex.
Thank's to God; I arrive to your channel! 😮
I listen a professional and true opinion and strenghts and weaknesses.
Big hug from CDMX. México city; México.
Currently have about 45k on my 20 LM2 been driving almost 3 years. Haven't had a single issue. I leave it in 2WD except when the weather demands more and I average 28mpg with a mix of city and highway driving. On road trips I have seen as high as 36mpg! All in all I have been very happy with it and hope to drive it through the half million mile mark before it needs replaced.
Very well done video.
There was a lot of new information there that I was not aware of.
My brother just bought a new Chevy pickup and we took it on a long road trip. Very impressed with the power and efficiency.
However, for me, some of those design Mistakes are unacceptable.
You are very thorough. Awesome work. Thank you.
Great video covering the 3.0 Duramax. I absolutely love my 2021 LM2. I currently have 25,000 miles on it and it has been great except I have experienced the long crank/no start issue a handful of times, but it has always started on the 2nd try and I'm hesitant to take it to a deal until I'm convinced that the ECU reflash truly fixes things.
I was so happy to learn that they went with the inline 6 configuration when they 1st introduced this engine. I still think Cummins is the top diesel engine offered in a pickup truck and I likely would have picked up a RAM 1500 diesel had their engine actually been a scaled down version of the 6.7 Cummins. I think that would have been a grand slam and caused many Ford and GM loyalists to jump ship at least if they were true diesel enthusiasts, but RAM missed the boat by going the route that they did with their diesel. With that said, I've heard some good feedback regarding the RAM ecodiesel, but who wouldn't want a mini Cummins sitting between the fenders of a 1500. Since I can't have a mini Cummins, the 3.0 Duramax is my next best option as there's just something special about the grunt and music an inline 6 turbo diesel makes and the balanced smoothness is amazing.
Also, I just wanted to point out that Isuzu has no involvement with the 3.0 Duramax like they did with the V8 Duramax. GM and Opel worked on the 3.0 development per the GM engineer.
Sorry to break your heart but the Cummings is going to be discontinued
@@guidoochoa2038 Thanks but not a problem for me as I have no intentions of purchasing a new Cummins powered 2500/3500 RAM as I just don't need that much truck.
Yeah I wish the ram had a 3.0 inline 6
I had no start crank issue right off the lot it’s embarrassing sometimes 21 duramax
I'm wondering why they're collaborating with other companies when designing the Duramax, do they not have enough talent here in the states?
Thanks for making this video! Enjoyed your video and learned a lot man. I just bought my first diesel which is the 23 AT4 with the new LZ0, so far so good...The torque is amazing! . I have about 500 miles on it so far so good. I came from a 17 Tundra 4.6L, I just hope this engine/ truck is reliable for the long run, since I've owned only Honda and Toyota in the past.
I picked up a 2023 AT4 LZ0 Diesel, too. Let's keep in touch for future experiences. Enjoy your truck!
@@rjsangha For sure man! I just hit 1,500 miles on mine so far so good.
@clubtc05 what kind mpg have you been getting if don't mind asking ?
@@rjsangha around 19-20 in city and around 27-29 on hwy.. you ?
@clubtc05 so i only got 150 miles , I been getting 23-24 combined , still have to take a long trip to get a freeway mpg. But I am impressed, coming from ram 5.7 hemi I was only getting 13-14 mpg with 3inch lift.
I have a 21, I do like the truck and it has good power and gets great MPGs. I get an average of 24 for my daily stuff and low 30's on the highway. It is very comfortable to drive and easy to get around in. However, I did get a check engine light as a result of a bad injector at just over 13K miles. All the injectors were replaced, which tells me that there may be an issue with them. But there was a consistent check engine light as soon as I would leave the shop and return it. The short of it is, they ended up replacing BOTH EGR valves and the exhaust brake. It was in the shop for 3 months because they had trouble understanding the issue. If I had to buy it again I probably wouldn't. One; Ive had it in for other warranty issues and it has to go back again. So I'm not impressed with the quality. Two; the longterm maintenance issues that was in the video gives me some concern. Three; it's always seems to be the emissions that ruin theses great diesel engines. If I can get it legally removed I may but at what cost?
Good to see no one else has had issues with their 3.0 Duramax. So far, I have a 2023 GMC Sierra 1500 with a 3.0 Duramax just 850 miles new and two check engine lights on it already. For those that want to know more, the codes were P0402 and the truck is brand new and in the Dealership Shop. Very sad.
My 3.6 warlock with 3.21 set is not sluggish at all. No lag. I’ve been impressed with it. I’ve owned 318 4wd reg cab manual ,360 2wd reg cab auto, 4.7 reg cab auto,5.7 4wd crew cab 3.55 set auto , Cummins diesel 2wd crew cab manual edge tuned , and this 3.6 is really impressive for a naturally aspirated v6. I averaged 14 mpg with my crew cab 4wd 5.7 and 3.55 set and it did have a lag in throttle. This warlock averages 20.5 with lt 285/70-17 and zero lag on the throttle. Pulls anything that I should be pulling with a half ton. Will go back to a lighter tire and hope to see some mileage improvements. This warlock with 3.6 is peppier than a ford f25o 4wd /5.4 I had and I would say tows just as well.
Great video, I have a 2022 refresh Chevy Silverado trail boss with the 3.0 and love it. Best power plant I have ever owned. Before I purchased it I did a lot of research and looked up reviews and mostly heard nothing but good things and that was my deciding factor.
Take it for a test drive you will like how it feels.
I own a 2022 GMC Sierra with a 3.0L Duramax/LM2 engine. I put a lot of miles on my truck, as I drive it for work. I’ve had it about 8-1/2 months and already have just over 18k miles on it. I LOVE this engine! (I love the truck!) I suppose you wouldn’t expect to have had any trouble with an engine after only 18k miles. Still, it’s an impressive little diesel. I came from a 5.7L Hemi in a Ram 1500 and was getting 15-17 mpg. The Hemi had a lot of pep and I put a lot of miles on that truck, as well. It was a dependable engine but the fuel mileage sucked! I’m now getting an average of 25 mpg with mixed highway/city driving. That equates to 600 miles out of my 24 gallon tank. I was getting just over 300 miles out of the Ram’s 24 gallon tank. Amazing difference! On the highway I get anywhere between 28-31 mpg, real world. And this Duramax has plenty of pep. It’s the one thing I thought I’d miss from the Ram but I haven’t been disappointed at all. It has loads of torque and pulls much better than the Ram 1500 did. So far, I can’t say enough about this engine!
Love it! Mated with the 10 speed transmission- an awesome combo. Love the torque and pulling power. Sometimes getting up to 25 mpg city and freeway driving. 30 plus at times hwy. Always affected by wind and mountains. I am in Texas and have taken it to Boise, Idaho. It really shines at 80 mph across Wyoming with the torque, up and down hills and 28-30 mpg. Had about 800 lbs payload and it never looked back. Wish the fuel tank was a bit bigger.
Great video and great details.
Best way to start a review "I've never driven one, but I will tell you what I think "
Belt is not a problem. He has no idea what he's talking about
😂
LMAO...
Agreed 100%,his opinion meh!
Lol🤣👍
I got the 2021 GMC Elevation 4WD X31 quad cab with 3.0 Duramax. Didn't put too many miles yet, just 12k miles, but I love this engine, specially the mileage. I'm getting 24 mpg combined. Andin the highway I got up to 31mpg in a trip from San Diego to the grand Canyon. Hope the engine will age well with no mayor issues.
Great video. Very informative.
Thank you sir!
well done video. very useful and interesting content here.
Thank you sir! Appreciate it
Putting the DPF up close to the turbo to filter EGR created packaging challenges and heat issues under the hood for the 3.0, but it is worth it in my estimation to greatly reduce the soot that EGR otherwise would carry into the engine, which is a very good thing as EGR is Hell on diesels. A friend has a Sierra with this engine, he loves it.
I have absolutely no complaints with my LM2. I have had 2 with no issues although low miles on the first one. In regards to the EGR "issues" that typically plague modern diesels... these trucks actually pull exhaust gas from after the DPF for the main EGR supply. So HOPEFULLY these engines wont have to deal with all the damn carbon buildup like every other diesel.
I have the 2021 1500 Sierra with 30,000 miles so far and no major problems. Runs strong and haven’t had a issue with the long start that was mentioning in the video. I did within the first 6000 miles have a DEF injector clip break causing fluid to leak under the hood and cause warning that speed will be limited until DEF is filled.
The updated version of the 3.0 duramax has lots of good revised parts and updates, such as steel pistons thicker sleeves 200k oil bet interval a healthy bump in hp and torture and much more 👍
I have a 23 LZ0 and it’s a beast
I have a 2020 sierra Denali with the 3.0, I love it, it’s torquey and decent on fuel
I'm a Mopar guy and love the Ram Cummins. But I think its really cool that Chevy decided to make an inline-6 engine...
History shows how good the inlines are. My old Ford with the 300 c.i and jeep 4.0L had very few issues overall as long as maintenance and cooling issues were addressed quickly. Im sold that mine will stay just as smooth, torquey and dependable, but what I struggle with is all the emissions crap they're forced to put on these new engines. I bought my 2020 LT 4x4 with the 3.0L and 10 speed in Oct. Of 2020 and now has 34k and I'm consistently getting 30+ mpg unless I go over 70mph and tows extremely well and fuel goes to about 17.5mpg fully loaded, but sucks the pee juice way too fast in my opinion. I keep hearing people say they only get 27mph and I'm not sure if it's that I don't have a low gear transfer case or perhaps different gearing or if we just drive different.
@@treetopace Yes, and BMW's make silky smooth inline 6's
I'm on my second 3.0L AT4. I have had no issues with it what so ever. The engine is a beast when towing, with a 22' trailer towing a full bundle of 2"x8"x12' PT lumber, I was still getting 12L/100km. I avg 8.1L/100km and have gotten as low as 7.4L/100km. My new 2022 AT4 (Re-Design) has a few issues however they seem to be based on the programming of the infotainment system controlling certain features as well as connectivity issues with my android, and the wireless phone charger is defective.
I crossed 52k in early October, more than half of that while towing our trailer. Had a DEF level issue (gauge inaccurate) issue that took almost 2 years for GM to finally address. But 5 Service visits and 30+ days out of service since October 8 - EGR Cooler, Valve, Pressure Sensor… Then Glow Plugs, now a Chaffed wire issue on the EGR Pressure sensor leg of the harness. My biggest issue isn’t the problems we had, but rather dealing with GM to get the problems addressed.
What was the resolution for the DEF gauge? Mine is brand new and the gauge shows 40%.
@@jamesclark7630 - Gauge is accurate when not trailering. It doesn't sample correctly, and can't predict range for anything with a trailer. I'm at 75k now and have learned to accept it. 40% means they didn't give you the truck with a full tank of DEF... Also - it's a 7 gallon tank (appx) but will show empty with 2 gallons (appx) left.
Lemon low
Great video, really appreciated the info that you gave. I’m wondering if turbo cool down is as important as on the bigger diesels? Considering buying a GMC Yukon or a Chevy Tahoe with the 3.0. I’m considering adding in a remote start with a turbo timer since it’s going to be the wife driving it and she might not always remember to let the turbo cool down.
I love these videos. I watch a ton of car videos, but unfortunately they are usually by automotive journalists. It’s great to hear from someone who has real world experience and knows what they’re talking about when it comes to nuts and bolts rather than stickers and wheels.
He has no idea what he's talking about. He never even saw one of this engines.
@@andp120 so a real world knowledge of how modern diesels function means he has no idea what he’s talking about. Interesting take.
@@stevenhugley4025 I was talking about this particular LM2 engine he has no idea. He never even saw one of this motors. Just the fact he's talking about a long start that was resolved more then a year ago. And belt is not a catastrophic problem.
Best damn powertrain in a 1/2 ton truck by miles!!!! I own a 2022 and this thing tows my RV better than my 2019 6.4 Hemi Ram 2500! I get 26mpgs city and 30mpgs highway. Towing my RV I get 14mpgs! Maintenance and oil changes are less $$ too! The oil belt is now rated for 200k miles which 90% of us owners will never even touch!
Happy to hear you like the truck and the Duramax!
@@TheGettyAdventures yeah I have several trucks (Ram 2500, F150, Ram 1500) but love my 3.0 the best! The torque and acceleration it has for the economy is astounding!
My wife has a 2021 GMC Yukon XL with 3.0 Lm2 we bought new we only have a little over 10K miles on it and get 28.5 mpg with the Cruze set at 80 mph haven’t had an issue yet. Lots of get up and go love it
I have a 2020 Silverado with the LM2, I love it, paired with the 10 speed transmission it’s a good setup. I’m not concerned about the oil belt, if it needs changed at 150,000 miles I’ll do it. I wish there was a delete for this.
LSI out of California is making a retrofit chain conversion for the LM2 / LZ0 3.0 Liter. The problem is that chain stretch and noise can be a problem. The belt from a design point is the best solution. Less centrifugal weight, and something about chatter and speed control issues were the biggest concerns. Forget that! The belt mandated inspection/replacement has already been bumped all the way up to 200k miles for the 23’ model years on up. I’ve herd the belt is supposed to be good all the way up to 250k miles at a minimum based on manufacturer tests. GM simply set 150k as their own inspection interval. Maybe they should come out and make clear what the belt manufacturer says the real truth is. Has anyone had a belt fail yet? The motor has been out since 2019. On another popular website this question was asked. No one has first hand seen or herd of a belt failure. Bottom line, the oil belt issue is a NON-issue. Period! It’s going to be the least of your concerns as an owner.
Great Video! The big engine you showed is a pushrod engine which are more compact and lighter than overhead cams which are not needed because of the low rpm. Tuners run the Chevy LS and LT gas engines rev to 9000 rpm. also pushrod engines are much easier to work on.
are overhead cams like vtec in honda? or how does it work exactly
Ford 3.5L EcoBoost = 20mpg average. 400hp / 500 lb-ft
GM diesel = 27mpg
277hp / 460 lb-ft
+35% better mpg for diesel.
BUT:
87 octane = $2.84/gallon
Diesel = $4.59/gallon
+61.6% MORE in my area.
Emission hardware reliability and cost has killed the diesel advantage.
Thanks for those facts.
The Ford is such a good product. The engines are built like a diesel. Heavy duty gas engines those ecoboosts are!
I have an old Ford f150.v6 and a Dodge Hemi.1500 Laramie AWD. Both are 2004 Models and Both have 300,000 miles on them.
Both serve their purposes perfectly.
I have a 2021 with the LM2 and it has been great so far.
Great video
I drove Sprinters before 3.0L and 2.1L , they are Ok
Now driving GMC 3.0 and just got to 50k mi
Absolutely love it , great in summer or winter (Chicago) . Torque is outstanding, I tow my sport car for 1000mi back and forward, thru mountain. Gas mileage is phenomenal, 6000lb I getting 16mi/gal on empty 24-28 80mi/h
Highly recommend
I picked up my 2023 with the Duramax last week. I have the max trailering package, which gives you a 13,000 max tow rating. I think it is a very impressive truck. I also have a diesel Range Rover, which I plan to sell next year. I believe the fuel mileage is similar, despite the fact that the truck is a lot heavier and more powerful.
What’s the most you’ve towed with your truck and does it drop a lot when you hook up to a heavy load ? I’m in the market for a Chev 1500 LZO max towing package myself !
I am also a heavy duty diesel mechanic and I bought the new lzo duramax and the reason I bought it was because it was an in-line 6 and DOHC and talking about the rear gear train the MX-13 paccar engine is a rear gear train and after rebuilding a few paccar engines I have never had to replace parts with the gear train and most of the ones I’ve rebuilt have had a little over 1 million miles
Enjoy your videos. Thank you
I own a 2022 ltd ltz z71 and I love it, I regularly tow a 16 foot enclosed trailer loaded out for work. It pulls it fine. I get around 13 mpg towing on the highway running 80. If I’m not pulling the trailer I’m getting around 28mpg on the highway. It gets way better mileage than any v8 1500 truck I have owned. I haven’t had the long start issue either. I have round 35000 miles on it.
The oil belt is not an issue, because you just replace it (you don't pay to inspect it at 150K and then put the old one back on). If it fails, GM chief engineer says it just limps you to side of the road, nothing serious/catastrophic. And the new update coming is longer belt interval, and almost 500 lb/ft of torque!
I guess that would make sense but still little annoying.
They’ve extended it to 200k miles now, too.
It's still expensive as hell! You have to pull the transmission to replace it.
@@jasonfalk7696 It'll be like a $1500 job at any competent shop. That's peanuts for an engine that can probably run 500,000+ miles with otherwise regular maintenance, stunning performance, and the best MPG you'll find in a half ton even at todays manufactured diesel pricing crisis..
@@PygmySurfer how, by waving GM's magic wand
The transmission doesn't actually have to be removed to inspect the oil pump belt. Drain oil and insert a borescope through the drain plug hole. It's right at the back of the engine directly below the oil pump belt. Engine can be rotated by hand to inspect the whole belt.
The belt is on the other side of a divider on the lower crankcase extension. It's physically impossible to see the belt even if you take the lower oil pan completely off.
truly love my 3.0L Silverado rst 2022
I sold my 21 lifter eating fuel guzzling power wagon and bought the 3.0 AT4. So far best decision I've made, tripled my fuel economy easily. Best part is you get benefits of a diesel but maintenance is still less than what my Cummins was and is similar or less than the power wagon.. scratch that it is much less than power wagon. I love how it's a I6 and honestly that's the big thing that drew me to it as I loved my mega cab Cummins. Speaking of cab Ram still has their tiny crew cab on the HD trucks, the GM has what feels like a mega minus the cool look and storage. Belt at the rear is nothing I'm worried about, it was done for packaging FYI but at well over 200k km I'll be on my 2nd or 3rd by then. Fuel economy is insane, driving easy at 90 to 100kph in the park I was down to 6.5L/100 and got well over 1000km on less than 90L.
we own a 2022 Yukon 4x4 with the 3.0L Duramax and love it so far and only in at 13k miles to date. we average 27-30 mpg on highways and easily 24-25 in town or a combined 26-27 most of the time.
Great I really like your content
It’s a great engine. 3 years, 60k miles so far. Excellent power and mileage. Smooth, quiet and efficient. No issues with the engine as of yet.
Def usage is a lot when towing tho. My only negative observation.
I own a 2022 Chevy with the 3.0L. At 6,000 miles the truck did not re gen for about 2 weeks and I got a alert that said service emissions system and the check engine light came on. the truck never went in to limp mode but after I called the dealership I woke up and cranked it and it re gened immediately and the check engine light went off. That has been my only issue. It’s got 23,000 on the truck now and I love the mpg I get. The best I’ve gotten was 35 on the highway and around town I get 22-27.
I have one 8 months I get 27 and up to 39 mMPG in highway at 55 MPH . I have towed up to 15,000 ( slowly and flat short distances ) pulls with ease 💪🏼💪🏼💪🏼 great engine and it’s ultra fast off the line . I put 40,000 miles in 8 months heavy work no issues .
Also, GM has fixed the long crank issue, Tim Esterhdol from "Pickup Truck + Suv Talk" YT channel has done some videos on that, talking to the GM engineer.
Fair enough! I'll have to have a listen. thank you for the info
I saw that interview too . They’ve fixed that problem.
The EGR delete is the first change I’d make to my diesel. There are TH-cam channels such as @darkirondiesel and others who demonstrate a step by step process to complete a delete and other mpg/power robbing stock parts. This was a helpful video - thanks! 👍
You do know that most dealers will refuse to work on one that has EGR deleted
@@glennschlorf1285 Not here in the midwest they just refuse to warranty it.
@@waterloo123100 well here in the southeast they will just tell you to take a hike and refuse to work on your illegal non compliant vehicle and in some states will just suspend your plates and fine you for non compliance
@@glennschlorf1285 That sucks for you dude. We don’t follow what the government tells us to do here
Tbh I'm not super happy about deleting my 6.7 and I wouldn't recommend
Oil pump belt will likely get a 200K mile replacement schedule based on actual wear, and the LZ0 uses the exact same setup and has a 200K interval, also the EGR is after the DPF so the soot level should be much much lower.
I have a 2021 Dmax 1500. @61000km. I have never been so happy with a truck as I am with this. I love the way it automatically down shifts at low speeds. Crazy acceleration. The reliability is great. I get 1000km per tank. By the way this engine is a Isuzu design with Great balance. Thanks for the great info!
Nothing to do with Isuzu ... Opel from europe
Love mine. Havent gotten the long start issue fixed yet. I get between 26 and 31 on the highway depending how fast I drive. Aside from the long crank, I havent had any issues with it at 22K and 2 years.
I love my 3.0l 2022 suburban. I changed out my oil to the amsoil (dexos D approved/won’t void warranty and it’s 100% full synthetic). Other oils such as Mobil 1 (also dexos D approved says it’s full synthetic but it’s only 25% synthetic) I also added the PPE oil filter (larger capacity(SKU#: PPE-114000650) and average 35 MPG highway. As for the belt I think it’s a little crappy but not a deal breaker for 150k mile intervals
Hope this helps anyone
Even with my tiny duramax diesel 2.5L inline 4 with only 6 speed at for my trailblazer was ran 60k during 3 year till now is very satisfy for that performance without any issue at all just kepping regular maintenance replace oil and all filters.. Great duramax at Indonesia..
Thank you or your time doing these engines,
I'm liking the price and the spec's for the new high country with the LZO diesel and 10 speed. it's a strong candidate for a upgrade for my 4th gen ram 1500 Laramie . i think that it's a great engine transmission package
I have a 2021 colorado with the 2.3 Duramax. I would love to be able to put a 3 liter in my truck, but the 2.3 is incredible in its own right. I get 30 mpg with it and love it.
I had the rear main seal issue on my 2020 Silverado 4x4 3.0 Duramax. My garage floor was full of oil when my truck only had 5k miles. My truck was in the shop for two weeks and was covered under warranty.
I drove one in 2021,super smooth,Heeps of power. I liked it better than my 2018 Silverado 1500 with a 5.3 v8
I have a 2020 crew standard bed 4x4 z71 and it has about 75k miles on it, first this power train is amazing I get 25-26 mpg going 75-80 during my commute but have gotten 29+ on trips from Santa fe to Colorado Springs and back.
1st issue the crank no start/ long crank is a 2021 model year issue, mainly because for some reason GM changed suppliers of the cam wheel between those years but did not update the software for the cam sensor, so the sensor was reading what it expected to be the 2020 wheel but since it was changed slightly it wasn't fully reading it, again not every 21 year truck has had this issue.
2nd the oil pump belt is inspected AND replaced at 150k but that service has been increased to 200k miles due to the belts still being in good condition.
Only new issue I've known is Def tanks going out, no clue if it was due to trucks waiting on lots due to the chip shortage or what but that seems to be the only issue with the trucks, and it's not an engine issue, all the other "concerns" seem to be an issue with diesels in general and not specifically LM2 related. Having said that this engine pulls my 7k lb TT with ease, it has plenty of power and just goes. Definitely an awesome engine
Thank you that was well done
I have had two the engine and I love it
Variable displacement oil pumps are great. There is no need to have full pressure at idle / low load, there is no difference in engine wear so might as well have the better efficiency.
I have a 2021 chevy crewcab standard bed Z71 rst 4x4 3.0 diesel . I have not had any mechanical issues. I'm getting 34 mpg all day long. I love my truck
Wow that information cured me from further looking at a diesel by GM
This 3.0 is absolutely astonishing!
I’ve been enjoying my 2020 Duramax. My best 50 mile average was 37.9 mpg. Life time average at 45k is 24 mpg.
There is a new version of the 3.0 Duramax diesel, it's actually more powerful than this particular engine. I would actually suggest doing a part two to this video when you get the opportunity to check it out.
This is a long comment, just a warning. I have a 2021 RST Z71 with the LM2, bought it brand new with 10 miles on the clock in May of 2021, and right now I'm sitting just shy of 30k. My family and I do a lot of traveling since my wife is from the PNW and my extended family is in Texas and spread out from Arkansas to South Carolina, so gas mileage was the biggest selling point for me. We went down to Mississippi last year and according to the computer our best average for 50 miles was 38mpg, but to be fair that was coming down the mountains of Montana. We did average mid-to-upper 30s the whole trip, but again I set the cruise at the speed limit except for the few spots where it was 80mph. I did have the long crank issue once and managed to be 1 of the lucky few that needed an ECU flash. My thought on the oil belt is by the time it needs that service I will have spent way more than $1k in service into the truck anyway and knowing it's going to be coming I should also have plenty of time to put money aside for that. My whole family loves the truck and it has been the best vehicle I have ever owned. My only complaint is the damn auto-stop button you have to press every time you start it up.
Our ‘21 GMC Sierra Elevation LM2 is at the dealer getting a slow leaking front crank seal fixed for the 2nd time.
A couple of points...the Gen 2 3.0 Duramax will have 305 HP and 495 FT LBS of torque. It should be available in a few months. Also, unlike the Eco Diesel and the Powerstroke, this engine was designed from the ground up for the Silverado/Sierra 1500.
and tahoe
@@ToymonkeyjrTahoe/Suburban are simply the SUVs based on the Silverado/Sierra platform
@@thesixgunfighter288 so I'm not wrong lol
@@Toymonkeyjr No, I’m just being more elaborate lol. Nothing personal meant. I’m very technical sometimes.
I have the gen 1 3.0
2021 it’s been a work horse 7500mi oil changes I burn 1 qt of oil that’s always been my modow only issue I’ve had is pickup pump in the tank just gave out at 47k mi gm is warranting this 5 min after I got it to em other than that the truck is great
I Have 44 k on mine it has a plate, and i have pulled over 18.5k lb does good. However, i am having issues with the def filter and cats or maybe a sensor truck goes into a derate mode currently at the dealer maybe it will get it back this week . However, I absolutely love this truck.
I sold these trucks, bought my demo. (2020 Silverado RST) At 55,000 miles, I have an average of 26.7 MPG with a high of 40 MPG. I recently added a Banks PedalMonster to it and wow! I am going for drives for fun for the first time in years.
Great video I have one 37000 Km’s on it one DEF sensor replaced 20 min job. Also the engine is an Opel designed diesel not Isuzu.
Fair enough! I wasn't sure but either way I had a feeling that's why the gear train was at the back!
I have a 2021 GMC AT4 with the 3.0 @ 50,000 miles. The only issue I have had so far is the starting issue. The first time it happened I thought I was going to have to disconnect the battery to make it stop cranking. The dealer has never been able to replicate it but they did show me the TSB for the cam sensor and told me they would need the truck for a week. Because of that I've never had it fixed. In 50,000 miles it has only happened about 8-10 times so I haven't stressed over it too bad.
I own two of them. A 2021 Silverado LT with 25k miles. I average about 20-24mpg with larger wheels and rims. 2022 Tahoe RST with 42k miles. This one gets about 27-32mpg with stock wheels and rims. mostly highway miles. I have to say they both have not had any problems. I really love my Wife’s Tahoe Rst with all the luxuries and comforts.
Glad to see Chevy kept the rear main seal leaking going in 2022
One thing about the EGR, they are drawing the exhaust from after the after treatment system. There is significantly less carbon ( basically none) being drawn into the intake because of this.
Hey Alex, for the 2023 model year 1500 pickup. They've now gone to the next generation of the 3.0 Duramax the LZ0. It has dual SCR & besides that, they just strengthened the heads & liners & block (& what not) for further reliability gains. Plus it has more power which lmao is always nice!
As the EGR system, this is actually a hybr id Low Pressure/High Pressure. Unlike virtually every other EGR system (in North America anyway) that is purely high pressure. Hence, soot won't be as big a issue
I read about the high and low pressure EGR. makes sense to bring gases that have already passed the DPF and taken out the soot. again it seems like GM was really trying to make good engine which I like to see.
as for the new generation I'm exciting to dive into it and see that's new!
@@TheGettyAdventures I have no idea why everyone doesn't do that style and eliminate one of the biggest issues with the emissions
I have a 2020 ram limited eco diesel. My father loved it so much he traded his 2015 3/4 duramax for a 2021 Chevy ltz 3.0L duramax. So I have a bit of exposure to both. I love both trucks.
My one complaint is the Chevy has the option where the truck turns off at stop lights and so forth. It can be turned off by a toggle but each time u start the truck it defaults to on. So everytime u get in u have to toggle it off. It's a small gripe but once your into the habbit it's not so bad.
The Chevy with the 10 speed shifts amazingly smooth. Even compared to my ram. The trucks have quite different gear ratio but the Chevy has gotten phenomenal fuel economy even over th eco diesel if you behave. At 110 km/h or (67 mph or so) his truck is doing about 1400 rpm. So it's just barely above high idle.
If the Chevy itself had a few options I prefer in my ram I'd probably buy one. And I still might for my next truck. As the ecodiesel is discontinued. But that's at least 5.years away. And I'm currently considering doing a full delete on my eco that it's just about off warranty.
lsn't it just lovely how...
they make theses things so costly ....
(and labor intensive) to work on.
ka'ching bling bling
fir the shops having more HARD WORK
for the diesel technicians.
I'm So happy with mine, i was ford power stroke owner, much better truck good fuel economy and performance for an 3.0L engine is impressive truck..
The chain in the back of the engine for the oil pump which needs to changed at 100k is a no go for me, I learned my lesson with a 4.0 Ford V6 with rear chains.
fair enough!
'22 silverado with 11K miles so far. No engine issues - I bought the truck specifically for that engine even though I'm a Ford guy at heart. I haven't had any actual 'failures' so far though I have plenty of complaints like the extremely under-damped front end, the poor performance of the infotainment, the auto start/stop (luckily easy enough to turn off), and the transmission seems to get confused and shift poorly from time to time. Also has about 30 thou end float on the rear axle that causes a clunking over certain bumps like entering/exiting a driveway. Of course nothing is perfect so I'm sure I'd have some complaints on any vehicle but at least on the 3.0 I have zero. Not a rocket but plenty of power for may day to day and towing an 8500 lbs trailer in the Sierras and Rockies plus I can easily top 30 mpg empty on the highway. Sure I'd rather have a 3/4 ton truck but I don't NEED one and don't want the added purchase, fuel, maintenance, and insurance costs that come with it. Over all I'd buy it again. I just wish they put this powertrain in a van!
The 3.0 uses a post DPF low pressure EGR to combat the soot issue.
I have a 2022 3.0 duramax with 117k on it. And love it. My idler pully exploded at 76k. But all I do is tow with it.
Hell inline 6 engines gas or diesel are bad ass. Love i6 engines!
How do you feel about the new 2023 3 liter diesel how many of the issues or things to be aware of in this video hense thinking about a diesel so it all new to me but I am a Gm support thanks
The timing system is chain driven not gear driven and to replace the injection pump you do need to remove the transmission. I am a diesel tech at a GM dealership. And they have pretty much fixed the extended or no crank issue with a software update.
US brands love the EGR. With EGR, mucho repair costs and rapid wear, so early replacement: good for business. Criminals. Cummins has a new Type 5 diesel engine, since 2016, sold in Europe; NO EGR, more power, longer service interval and life.
Would like to hear your thoughts on the updates with the 2023 models and LZ0. A test drive would be crisp 👌
I have no dug into the new engine yet for 2023 but it is certainly something I'm looking forward to doing!
Same engine really, 90% of people won't even know the difference
Pretty much the same engine with like I hear 25% upgrades to it . Mainly the piston head design and metal used .