Duramax 3.0 Maintenance and Serviceability (LM2)

[@MasterJacks]

*UPDATE* -- I FOUND THE STARTER! It's where you'd expect to find it at the rear of the engine on the passenger side. It's very buried, nestled between the exhaust and the engine block covered by extensive heat-shielding. You can see it in this linked video: kzbin.info/www/bejne/pZ6qmXhtbKmleLc beginning at 0:34. Doesn't look fun to change! I think deactivating the auto-start/stop feature will postpone the inevitable laborious task.

[@youarerightboss]

The watered down version of the Duramax 6.6 liter V-8 diesel engine.

[@youarerightboss]

The poor man's version of the Duramax 6.6 liter diesel V-8 engine.

[@youarerightboss]

The aforementioned entity is just another pretentious pretender.

[@mikkei3532]

Its italian design = very crap. VN Motori always had stupid shot engines

[@phantomwalker8251]

start stop,is only to up the ratings of the trucks mpg..its a bullshit button..like traction control,turn it off...these trucks over heat,,flaps in the inlet,fall off,wet belt & all timing at rear,more bullshit mechanical wizardry.another fail for gm..they use chains,as there lighter than gears,,but dont last as long.look up MWM,4.2 tdi.my 2002 super duty has one.sold world wide,except u.s,,from brazil.all german mechanicals,7.3 running gear..bullit proof trucks..no tech,no computer,no glow plugs..mine gets 12 lt 100,& 700 nm..

[@777jones]

Upvote if serviceability and durability are your #1 consideration on a vehicle. Yet manufacturers never make it a priority!

[@Heatherder]

Engineering is about compromise. I’m sure they did their very best. Theres only so much space under a hood.

[@randomsanwhich2]

They solved a huge issue with EGR problems and DPF filter other diesels have. They moved the DPF right next to the turbo to improve efficiency. Due to the heat during a regen they had to move things around to accommodate.

[@benjaminturpin2749]

I downvoted you

[@MrMemphisTn901]

Bro I'm 1:10 into the video and I already appreciate the attention to detail with words and color enhancements popping up on whatever you're talking about.

[@stubbsbtw]

Thanks for an insanely in-depth review, really hard to find these for almost any vehicle

[@genehart261]

A friend of mine just bought a '24 GMC with this engine after driving ALL of the competition several times. This truck seems to set a new standard at least when new, I'm hoping that it gives her many years of trouble-free service. I really appreciate this deep dive into maintenance and service procedures.

[@williamwhitted2490]

Thank you for a video free of rambling, terrible music and straight to the point.

[@cubanpp]

WoW never seen so many haters commenting altogether, those who usually can’t afford a product are the first ones to hate 😂🤣, I am enjoying my truck and also bought the extended warranty, awesome truck by the way and I love it!!!

[@Maverick09171]

Ain’t that the truth! but.... but.... the oil pump belt! 🙄🤦‍♂️

[@2ataylor90]

This is a great video. I'm in the market for a truck and drooled over one of these at a gas pump haha. I know nothing about diesel but have some serious Cummins dudes on deck for advice. Things are getting really complicated these days and the manufacturers are banking on ppl abusing vehicles, ignoring regular maintenance, and not preparing for the big jobs like timing, starters, transmissions etc. Do your research, buy something you can afford that will realistically fit your needs over the wants. Study the design and look up major issues and TSBs.

[@jeffk3370]

EXCELLENT video, thank you! I really like the video editing how you pause the frame and highlight the items you are talking about.

[@uchec31]

Wow 👏, best critic so far. You sir know what you are doing.

[@jtomtl]

Transfer case, transmission case and oil pan are all made in metal! Awesome!

[@JK-pf4um]

Great video, great over view , wasted 17 years of my life fixing GM experiments .

[@4xsilverado]

Straight to the point, talking the man's man language. Good video

[@tomrunning357]

Great video with a whole lot of information and thanks for actually removing covers and skid plates to show everything we needed to see to fully understand the maintenance.

[@antoniosimmons3930]

We need you to do all car reviews from here on out!!! AWESOME JOB!!!

[@platinumlawnservice]

Sweet bit of engineering that went into that engine! Good job GM

[@scottykormos]

Great video. To the point without a bunch of blabbering. Love the all business delivery of info!

[@SDSGarage89]

Awesome vid on basic maintenance and serviceability access for these trucks. Thanks 🤝

[@juanrivera6592]

Thank you so much for this. I have a 2021 and this helps out more then you would think. Thanks again.

[@WaltANelsonPHD]

This is a great video, especially for us who are not mechanically inclined. The diesel set up in this truck looks very complex. As comments nearby suggest, many will find the 5.3 L gasoline (or even the 6.2?) more agreeable or less frightening ( take your pick).

[@repairvehicle]

Gas is definitely better option for those who don't want problems.

[@WaltANelsonPHD]

@@repairvehicle Do you suppose that all-electric will supplant ICE given the complexity of internal combustion compared to the simplicity of all-electric?

[@repairvehicle]

@@WaltANelsonPHD , electric vehicles not simple. More complex and have ton of issues due to heat.

[@WaltANelsonPHD]

@@repairvehicle Ok. Well, v bloggers in Grest Britain complain about costs to recharge. Driving range is improving. I think the Saudi should buy FCA and leade all the cars at low rates with lockup subscription on gasoline. You know, the cell phone business model.

[@repairvehicle]

@@gomerpyle7721, you can disagree all you want. Reality speaks for itself. When electric motor fails on electric car, it's being thrown away. Why, to complex to fix. Electric cars is the biggest scam in human history, it's just a matter of time when people realize. Pollution from electric to the ground and water is so much more because electric cars disposable and nothing is recycled.

[@TrevorATX]

That was a really good informational video. To the point and useful. Thank you

[@Vetteman6363]

I have the 3L diesel in my 2020 gmc Denali and love it it’s a great engine.

[@repairvehicle]

How is your oil consumption? Did get you get extended warranty? You going to need that with 0w-20 oil.

[@repairvehicle]

@@robvinson6547 , this engine will never make 100k miles without major engine repairs due to 0w-20. Gm using better oil in their 2.7 engine 5w-30, that generates less heat. Heat degrades oil extremely fast, no wonder his oil lab results show metals wear numbers high and extremely high for copper, that's only with 3k miles oil change intervals.

[@repairvehicle]

@@robvinson6547, you are talking about an engine that used proper viscosity oil. 6.6 had 0 emissions equipment except for egr cooler maybe. 6.6 had 0 timing chains for which gm is known to have issues with on their gas 3.6 engine. 0 timing chain guides which are problematic on long timing chains, gm has bad reputation for it. 6.6 had trouble free gears vs problematic timing chain. 6.6 does not have any rubber belts inside engine.

[@repairvehicle]

@@gomerpyle7721 , there is more to oil than flash and boiling point. His lab results already proved that 0w-20 oil is pure garbage and destroying his engine like cancer in human body.

[@calebniederhofer6529]

@@repairvehicle When before 07 , all diesels now have dpf . I am not sure where you got that info, but is far from accurate

[@mister0ldschool]

Answering all the questions no one else ever does, thank you!

[@kevinswanson3910]

I find the power much better then my last 3 5.3 gas trucks

[@BraydenSomers]

Most insane in-depth review. Thankyou brother

[@7THxSIGN]

Brother, thank you so much for such an in-depth and informative video!

[@josephharvey5742]

Thanks for such a great video and it will help me when I do some of the simple tasks of servicing my engine!

[@TonyM132]

I would like to buy a new Silverado with the 3.0L DMax once production resumes after the current shutdown, and I am not worried about the oil pump belt. 150K miles is a long ways and a long time, folks. I bought my current pickup truck new 15 years ago, and it has 122K miles on it now. By the way, the maintenance schedule says the oil pump belt should be changed at 150K miles or 15 years, whichever comes first. Since I also have a car, I don't/won't put 10K miles/year on my truck, and 15 years is a long time down the road.

[@volocty]

Nice quick review of the engine and drivetrain. Impressed with what GM is doing with their diesels.

[@whispr6331]

This is an incredibly detailed review. Tbh, the duramax isnt as bad to service as I normally thought. Replacing the battery looks like hellish nightmare however. Swapping an oil pump drive belt at 150k seems expensive. A starter replacement isnt much cheaper either.

[@AlisoBob]

Fantastic walkaround... . Thank you.

[@jeli1347]

Great video thank you for going through all of the trouble to make it I'm sure this couldn't have been easy.

[@Maverick09171]

I have a 2012 5.3 Sierra and am thinking of turning in for a 2020 3.0 duramax. Interesting to see you make the comparisons in this video.

[@GrandPrix46]

Hopefully you watched this video and ran away from that damn thing.

[@MasterJacks]

*UPDATE* --INTERCOOLER & ENGINE HAVE INDEPENDENT COOLING CIRCUITS I'm learning a lot as we go along here. Thanks for the feedback. "The intercooler system includes an air cooler/heat exchanger built into the intake, a charge air cooler (CAC) radiator assembled in the front fascia, and an electric coolant pump." gm-techlink.com/?p=12050&unapproved=6838&moderation-hash=a4ad0556ede3feaa487c55bdd848214b#comment-6838

[@mattfisher401]

Great coverage of this truck! Lots of concern about the oil belt, but this to me is scarier. I own one so it didn't scare me off. Neat technology, but we're going to be the guinea pigs!

[@kadeshumway804]

Appreciate the video and in depth review

[@guod1973]

Hmm maybe that olds 350 diesel wasnt such a bad design. This thing is a nightmare.

[@mikkei3532]

this is italian engine WN motor :) - piece of crap

[@zelenizub2036]

EPA is the problem not design.

[@saltysteel3996]

@@zelenizub2036 EPA is killing the entire diesel market thanks to the VW scheme. EPA is out for blood.

[@kens97sto171]

@@mikkei3532 Are you sure? I thought this was a ground-up design from GM.

[@marioncobaretti2280]

i worked for an olds gmc dealer back in 84 to 86 , i made a lot of money flat rate working on them. total mistake creating it from gas 350 olds. this 3.0 looked real sweet till i saw that oil pump belt ,WTF!

[@slowsleeper550]

Thanks for the in depth video.

[@David-yy7lb]

Just wait until the recall on the belt driven oil pump

[@anthonywebber2211]

Recall on a wear and tear item, ok genius

[@David-yy7lb]

@@anthonywebber2211 hey genius those Wile E. Coyote engineers should have engineered a crank shaft driven oil pump like the 6.6 dmax an LS engines...but you go ahead and buy the truck and when the belt breaks on while you're driving come back and comment

[@americansniper1641]

Anthony Webber my dura max with 20k miles broke while we were going to Malibu right at the start of all this corona virus happening well now the truck is at the dealership and I’m out a truck for probably the rest of the year

[@americansniper1641]

Don Olypopper since the belt that drives the oil pump broke while it was running aperantly some parts inside the engine started running dry and seized the cooling system failed while it was all happening and the turbo charger broke off a teeth and hot exhaust entered a cylinder which caused it to worp anyways great thing is it was a lease and I’m the process with my attorney to have this past 3 months refunded and my lease contract terminated

[@davidmaldonado9717]

@@americansniper1641 you experienced what is called major engine failure man hopefully you sue those bastard at GM

[@TonyM132]

Engine cooling system capacity is 20.2 quarts, according to the 3.0L Duramax supplement manual. It also has a footnote there saying "Engine cooling system capacity values are based on the entire cooling system and its components." Maybe that means combined capacity of engine coolant and charge air coolant?

[@MattSchmader]

Outstanding video, keep it up!

[@bigdiesel6725]

Nice video. Only GM could find a way to complicate the hell of out of a battery change.

[@BERPSU1]

I don't know, Chrysler did a pretty good job of it beginning about 25 yrs ago.

[@charliehippler770]

BigDiesel67 My Jeep’s under the passenger seat. 🙄

[@kaulincurtis9665]

At least the oe battery lasts a long time. A friend of mine has owned an 09 6.6 since new and it still has the original battery. I'm waiting for it to leave him stranded lol

[@ever4437]

As bad as Ford by shoehorning an engine where you can’t work on it without taking the cab off of the frame. Way over engineered. Jesus Christ a belt for the oil pump. Can’t drain radiator, water temp at 210, gm trying to get mileage by running both gas and Diesel engines hot as hell. Shame GM

[@deansapp4635]

I use to work on BMWs, We charge a hour labor to change a battery cause its buried. Worse is that you had to put the scanner on and tell the car it had a new battery installed or it won t charge properly. Crazy i know

[@zachattack-b6t]

great video! thanks for sharing your knowledge!

[@LincolnSixAlpha]

Thank you, great video. Appreciate the info!

[@ericarntson2035]

This looks for all the world like an Audi engine. What a mess. I want some of what these guys were smoking when they decided to use a belt-driven oil pump and put the timing system on the rear of the motor. Pure genius... if you want to guarantee business for your service departments.

[@kens97sto171]

The timing components on the back is not such a big deal. Generally speaking chain driven timing components last a very very long time IF they were designed properly and that's a big if unfortunately. Would have been better to be gear-driven like Cummins. And whoever the hell decided to use a wet tooth belt to drive the oil pump needs to be shot. What an absolutely idiotic idea. If they were going to do that they should have put it on the front of the engine where it was easier to get to. Dropping the freaking transmission to change a belt every 150,000 mi. There are some guys that would have used this truck for light duty hot shot, or courier vehicles because of the gas mileage. But they're going to put 150,000 miles on the car every freaking year. Absolutely idiotic. Not to mention the fact that when the thing goes in and that transmission gets pulled off how many things do you think the dealer is going to break screw up not put back together correctly when they do that work which ends up in yet another repair situation. Wiring harnesses not put back where they're supposed to be etcetera. Just stupid as hell

[@chrisheffernan7540]

I drove a new 2021 at a dealership today, was very fond of this engine, until I did some research on it this evening and found out about the oil pump belt. This may be a deal breaker for me. I think I'd rather get the gas engine instead.

[@Heatherder]

Chris Heffernan thats a stupid dealbreaker. Inspect your belts like u should anyways. Timing belts have been used to decades, just as important as oil pumps.

[@ericarntson2035]

@@Heatherder Timing belts aren't submerged in scalding hot oil and thus are not subjected to temperature cycles that vary as wildly as what that oil pump belt is subjected to - it's a "wet" belt. As for your other comment, good luck inspecting it; it's sandwiched between the engine and the transmission, thus requiring a removal of said transmission just to inspect it.

[@Heatherder]

Eric Arntson alright eric lets think about this. Have you ever touched a timing belt on a freshly shut down engine? It’s hot. It experiences friction and its touching the cam and drive shafts. Metal conducts heat really well btw, its going to be nearly as hot as the oil. Most engines require removal in order to change water pumps, chains and oil pumps. Dropping a trans is a simple job on a lift and just as or easier than removing the entire engine, way less hookups to remove for starters. A wet belt is submersed in a cleaning, cooling bath of oil and is made from very durable umhw thats going to withstand it. Unlike a chain it needs no tensioning and it wont stretch as much, has less resistance as well. It makes perfect sense. Personally I think that all engines should use gears when possible. I dont like chains, but gears do require shaft and bearing housings all along the block and those bearings are wear items and can be difficult to change, require insane oil routing and if any of that fails with break just like a chain or a belt. In any case, the wet belt is in a much more controlled and reliable environment than a covered timing belt. Clean oil is never a bad thing for a component exposed to friction.

[@greengeeker1]

Awesome video! Loved the graphics with the highlights.

[@Z-Bart]

New batch of engineers. "Lets reinvent the wheel".

[@daves1646]

The 3.0 Duramax has a more complex motor cooling system, with 3(?) different sections (head, block, passenger compartment?) that can be controlled separately. Will it be as simple as a ‘normal’ cooling system to do a flush and change? Or is it more like doing 3 separate coolant changes? Thank you for the quick look at the Silverado maintenance access with the new I6 Duramax!!

[@GIGABACHI]

Good Old engineered in product planned obsolescence from the design stage. Oil pump belt, et al.🙄😒👎🏻 Thanks for the video and I wish you the best with your new truck.😎👍🏻

[@flight2k5]

You know Henry Ford started that in the 1920s right 🤣😂

[@saltysteel3996]

@@flight2k5 Yup, LEAN and Six Sigma. Bunch of BS.

[@Maverick09171]

“Product planned obsolescence” that phrase don’t even make sense in this context dude.

[@GIGABACHI]

@@Maverick09171 I don't care what you think, Troll. 👅✌️

[@Maverick09171]

JIGA BACHI if you think the vehicle is going to be at the end of its useful life because it requires a belt change, you’re a moron. How long do clutches last? 150k-ish miles? When your clutch goes out do you say “gee, guess it’s time to buy a new car”? 🤦‍♂️

[@Kcducttaper1]

Man, diesel trucks used to be so much simpler 20 years ago!

[@johnhill3250]

Kcducttaper1 It's called EPA

[@Kcducttaper1]

@@johnhill3250 Indeed....

[@marioncobaretti2280]

the obama years epa really smacked diesels down with the def system.

[@Maverick09171]

You mean when they were dirty, noisy, ran rough and made no power? Yep you’re right!

[@Kcducttaper1]

@@Maverick09171 You could double the power on some of them with just a different fuel plate.

[@TomPlaneto]

This was awesome! Can you do one of these on the new 3.0 powerstroke please?

[@aaronbadboyflexxer9173]

No

[@Hoosier574]

Very useful video. I own a 2020. I was wondering any info or maybe a video on glow plugs on the 3 0

[@AlienCatcher23]

This engine might be the smartest thing Chevy has done when it comes to the Canadian market. Our gas and diesel are the same price (with the diesel actually being cheaper sometimes during the year)... Probably why the Ecodiesel has a massive uptake here.... this thing would be perfect with my 40km a year of driving a year...

[@myrongaines5542]

Sealed transmission. Headache to change the atf.

[@AlienCatcher23]

This was an awesome video.

[@jaysway007]

Great Video ! Thank you for posting ! You saved me a trip under my truck.....for now...lol

[@falconfalcons-ef7zu]

Thank you thank you great job well done

[@JoeHynes284]

really interesting set up, thanks

[@ernestmorales1023]

I have the 2021 . Love it .

[@robblower9274]

Is there an auxiliary battery for the start/stop system on this engine?

[@Marko454]

Any advise for a Service charging system code on the 2021 3.0 diesel

[@tundras4ever552]

I think this is a pretty cool truck. Would have love to see them early 2000s instead of now with all their restrictions

[@matthewfischer]

Could you be more specific about where that coolant drain hose is?

[@stayunique91]

Awesome video! Looking for a new vehicle for my wife, one possibly is the new 2021 Tahoe with the 3.0L dmax. It doesn’t look too horrible to work on except for the starter and oil pump belt. I currently drive a 07 dmax so can’t be much worse to work on. Hopefully lol

[@repairvehicle]

Did you noticed oil viscosity 0w-20, it will destroy engine in no time.

[@stayunique91]

repairvehicle why do you say that? I was talking to a Cummins engineer a few months back and he was telling me soon all of their engines will use a 0w-20 engine oil.

[@repairvehicle]

@@stayunique91 , I know. All of the Cummins engines will have life expectations of 60k miles and after that major engine repairs.

[@repairvehicle]

@@stayunique91, by the way, low viscosity oil does not even exist for diesel engines.

[@stayunique91]

repairvehicle dexosD is formulated for light duty Diesel engines. Available in 0w-20 from both AC Delco and Mobil. I would think that the engineers would select the proper oil based on the oil flow needs and bearing clearances.

[@Actionangel]

Why couldn’t they put the 3.0 in the colorado

[@jimmaccari1489]

Great informative video. Thank you!

[@mfeijo]

Great video! Subscribed!

[@jameskeith925]

I need to know where power steering fluid goes in

[@davidtiebs7741]

Well done thank you .. great video

[@domeniclux2987]

Thanks for info Gm looks like a maintenance nightmare

[@MegaHEC1]

Hey the little surge tank I have the 3.0 duramax but the small surge tank get low why not the big tank

[@allenwendling6966]

Nice maintenance review.

[@korn111685]

The aftermarket will hopefully come up with an oil belt delete with a gear set.

[@GIGABACHI]

😬🤞

[@repairvehicle]

It will never happen.

[@nahrens223]

I was fixing to post the same thing. To all the ones that say it will never happen probably completely underestimate the diesel aftermarket. They are probably the same ones that said a 6.0 Powerstroke would never be reliable but once you bulletproof one it'll last as long as a CR Cummins like it's suppose to.

[@repairvehicle]

@@nahrens223 , there is no room for gears. 6.0 was designed for commercial application, school buses, big truck and so on. 3.0 Durumax is not designed for HD applications and its already has proven as problematic engine. Look at oil analysis report he posted, engine wear is beyond limits.

[@nahrens223]

@Don Olypopper look boomer. I've been a diesel mechanic for 15 years and I've built several engines. Built my Hot Rod Cummins for my personal truck. Don't try to school me on something that I've seen firsthand go the distance. I've got friends and family that have done bulletproof builds on their 6.0 Powerstrokes and have gone over 300,000 miles with little more than a sensor here and there to have to replace.

[@schm147]

All these people complaining about the wet belt like it hasn't been done before. Ford and VW have been doing it for years, what issues have they had?

[@Heatherder]

Fr. It has a service interval, meet the service interval and youre golden

[@alextran8188]

The wet belt isn't the problem. Its the fact you have to pull the trans to replace it, which will be expensive.

[@194incident]

what do u think about the oil pump rubber wet belt longevity

[@kavii818]

Great video. Thanks

[@danielthechskid]

People are all bent out of shape about the wet timing belt but it is literally a non-issue if done right. Honda has been using them for decades (since 1997) on the GC/GCV and GS/GSV small engines as well as the GX25 and GX35 (which should have also been GC not GX) OHC engines. The only thing that ever happens to these with any regularity is that a cold start with a too thick viscosity of oil could make the belt hydroplane and jump off of the cam sprocket, so Honda updated the valve cover to add guides. Being air cooled engines this belt is also subject to higher temperatures.

[@ptipete]

Howdy! Is there room under the truck for a amsoil bypass filter system?

[@Pickuptrucktalk]

Nice video!

[@benjaminwayneb]

Why use a wet belt driven oil pump in a truck engine?

[@blairski22]

service dept money... aside from that belt, and all regular maintenance items this engine would be too cheap in the long run to own.

[@Jackmerius_Tacktheretrix]

@@blairski22 exactly, same reason the fuel pump drive and timing gear is on the rear, to keep you spending your money at the dealership.

[@repairvehicle]

Gm dumb engineering.

[@benjaminwayneb]

@@gomerpyle7721 Oil pumps don't have balance issues.

[@georgegarza6960]

Do these 3.0 duramaxs need to see dealer after high mileage? Like the larger Diesel engines ?

[@jimbo2487]

Wet belt? I’m out!

[@7777777777e]

@Mr. Sunshine you dont need to buy a new vehicle. Fixing something old or riding a pedal bike is better than dealing with the new shit.

[@mauricemotors8207]

@@7777777777e on top of a 10 year note

[@ImHim45]

Great video!

[@Jackmerius_Tacktheretrix]

I was ready to pull the trigger and switch to a Chevy since they out a proper inline 6 in their half ton until I saw that the Oil pump is belt driven and at the rear of the engine along with the fuel pump drive and timing gear. You have to drop the transmission to service these items. And the cooling system, like the 2.7 turbo 4, is way too complicated. Decided to keep my Titan XD, and I dont think I'll be getting rid of that anytime soon unless my towing needs change and I need a 3/4 ton

[@repairvehicle]

Look at the oil viscosity 0w-20, engine failures guaranteed.

[@Jackmerius_Tacktheretrix]

@@repairvehicle 0w20 in a diesel? Holy shit!

[@92powerdiesel61]

@@JoeSchmoe7 That's good, I may actually look at one knowing that.

[@ericbustos45]

Does this have two batteries? I think I see another one buried next to the glow plug module

[@Drvinnieboombatts]

thank you, that all i can say

[@FreedomWon20]

Sir, can anyone pls show me where the MAP SENSOR is on this engine? Standing by....................

[@mistermaster1945]

7:20 diesel exhaust fluid???, never seen that feature in every car in my country, what that liquid do anyway???

[@amandayuman6576]

Where would the EGR valve be located on a 2022 GMC sierra 1500? Help please, anyone pointing in a direction would be helpful

[@MrNismopro]

Are these things really experiencing engine cooling issues? I saw a video with someone that only had a couple hundred miles on his and it overheated.

[@MasterJacks]

If it's the same one I saw, it looks like a programming issue with the front louvers. Hopefully just a software update to get early bugs out.

[@MrNismopro]

It’s this one... kzbin.info/www/bejne/pJuqgYNoeqaKns0

[@cordellroberson532]

@@MasterJacks its weird they run hot, GM put a dummy gauge on the IP it isn't the actual coolant temp. but the engine likes to hang around 225 or so (According to OBD2 "Coolant 1 sensor") the IP gauge will move up to about 220, the louvers will be closed 99% of the time when stopped. they only open for brief periods when the engine gets over 225. I am hoping to a techlink to come out showing where the coolant sensors are located, "coolant 2" runs over 230..... i believe its the intercooler but that only has a 5psi cap so hopefully not. my understanding is that the LM2 does not have an actual thermostat. and that they stall the coolant to keep the temps up to improve efficiency. The 0w-20 oil works HARD in these engines with temps over 240 unloaded, 280+ when towing. sadly the LM2 has a designed lifespan of only 150K miles(according to the chief engineers).

[@MasterJacks]

@@cordellroberson532 thanks for sharing. It sounds like they're intentionally trying to keep this thing hot to keep the catalytst at optimal temp. I wonder if that may be causing them some early problems. Like you say, they're now regulating and directing coolant through "active thermal management" rather than a simple thermostat. It's complicated, but software updates will hopefully iron out early troubles.

[@firstaid4film]

Rick Rodriguez No issues with mine so far.

[@dougc190]

Glow plugs what is this a 6.2 diesel.. I hope.. I'm glad you like your truck but good Lord there's nothing easy about that. Remember when straight 6's used to be easy. That makes a current a X15 Cummins easy to work on

[@panthermartin7784]

Lol ohh my, you do realize other modern diesels use glow plugs right?

[@Vickvineager]

You do realize all modern diesels have glow plugs? Most if not all have heated intakes as well. Even that X15 you speak of have glow plugs.

[@AsianNIGMA]

Tom Markulics all except one... the best one... INLINE CUMMINS DONT HAVE THEM

[@AsianNIGMA]

Panther Martin77 6.7 Cummins wants to know your location

[@bewareofgod892]

As a gm technician about to pull one of these motors at 15,000 miles for catastrophic engine failure I can tell you they absolutely suck to work on. God help me.

[@MasterJacks]

lol, best of luck to you my friend

[@bewareofgod892]

@@MasterJacks much appreciated sir. Great video!

[@patmcbride9853]

I wish I could run the backup camera on my 2021, but GM "noped" the option of using it when in anything but reverse gear.

[@Italianborn]

There’s a module or something right beside the battery that is bolt on a bracket, do you know what that is ? I just got the empty bracket LOL

[@northgategmfleetmanager8137]

Nice review Son.

[@apprenticefelix7740]

Front mount starter that i like a lot

[@MrTacsgt]

Have you had any issues with the "Intake Manifold Runner Control Circuit Performance" P20F8? I got an engine light along with the cooling fan at max speed

[@meir800]

So first the time today when I drove in the morning (30°) everytime I came to a stop at a red light I felt like the truck rock from the swishing of fluid maybe def or diesel is that normal in the cold , any suggestions

[@Scott___T]

What size socket to replace to fuel filter?

[@MasterJacks]

1-7/16"

[@Lunatech04]

Very good video!!!

[@salcas8190]

Auto stops safety concern??