3.0 Duramax opinions/experience??

[180ls1]

Turbo 4 oil leaks. Pcv separator back of head and left side. Turbos.Some low mileage failures. I would stick with 5.3 Some lifter failures. I have a 2024 hd with 6.6 ?

Thanks, and the 5.3 but turn off v4 mode?

My family needs a new SUV and I am a little terrified of the 10 speeds and engine combos costing a lot in an already costly SUV.

My current suv has been unbelievably reliable its just too old.

 

[StuckInTheEast]

2020 ok later models have seen problems. Fellow employee put 2. 6.2l in same truck. One at 25k second at 28k 2023 model.gm bought it back

6.6 gas having big issues too per my contacts and acquaintances at GM dealers... Just priced one for a guy with a 2020 2500hd with 130k...meticulous maint record, cam/lifter failure with piston to valve contact...You can buy a brand spanking new long block from GM for under $2500...the catch is there is a $7k core charge. Im told this is typical practice when GM is eating alot of them under warranty and wants to reduce costs and needs cores to rebuild.
I hear alot of horror stories of gm vehicles under warranty stacked up waiting on back ordered parts from techs and parts dept guys I talk to first hand. When the people that work there openly and honestly tell you they don't know how GM is still in business...that speaks volumes to me. I hear the same from guys a Hyundai/Kia.

As much as I dislike stellantis for numerous reasons, the Ram 1500s have been pretty solid. Transmissions holding up better than either ford or GM. 5.7 and 3.6l have been good overall...other than 3.6l eating cam shafts now and then. Few lifter/cam failures on 5.7l but not as prevalent as GM.
I've seen way to many people get bit with major engine and/or transmission failures on GM trucks and SUVs with AFM ls and LT series engines and 6,8,10L trans right around 100k miles to ever be confident owning one out of warranty.
Lately it seems GM and stellantis are in a competition to see who can run out of parts to support their products the fastest.

The auto industry as a whole is in bad shape from a value/reliability standpoint across the board. It's pretty disheartening honestly. Cost of ownership has gone up exponentially while quality and longevity have decreased.

As for 3.0L duramax, I've not seen alot of them yet. They run strong. Mileage is good, but not that great considering diesel costs more most places. The only two I have long term(over100k miles) first hand experience with have had major engine or transmission repairs under and out of warranty. Both have since been unloaded. I forsee parts supply issues given GMs track record and the relatively small % of vehicles produced with that engine vs other options. Long-term They will likely expensive to keep going and harder to find parts for than gas counter parts...I would consider other options, not that there are really any great ones out there presently IMHO.

 

[ShortMountain91]

I've got a 24 with 18k on it. Came from an 04 Chevy with the 5.3. My 24 has been trouble free for me. I love the truck. Drives smooth, gets great milage, and it has towed everything I've put behind it like it's not there but the heaviest was only my ski boat which is only around 5k lbs. I've got the max tow on mine so would like to see what it would do with a 10k plus load but so far it has fit my needs perfect

Sent from my SM-S936U using Tapatalk

 

[jstraf]

I had a Sierra with the 3.0 for a year back in 21. Put 43k on it, and liked it. Good fuel economy and smooth power. It had a few issues no starting, where it would just crank for 30 seconds and not start, then start normal the next push of the button. Annoying, and a little embarrassing sitting at a gas station around people lol. Otherwise it was a good truck.

 

[tdhanses]

Yeah, I've been reading somethings online saying GM changed the valve from the power train warranty to the 3yr/36K emissions warranty. Hoping that's not the case. I guess I'll find out on Monday.

Also safety recall doesn't fix anything, it hopefully puts the truck into limp mode before failure. Tranny still needs to be replaced, now I just get to drive it slowly to the dealer instead of having it towed.

Safety recall locks out 8-10 gears preventing the lockup, not sure how extensive the repair will be but I’d assume it’ll be covered under warranty and then after might be converted under the recall.

Not that worried about it.

 

[Weldor]

Ford and Stellanis dumped their small diesel, only option is GM. Too bad there is no competition, sometimes that makes them step up and improve things or known problems. The only problem I have with new trucks is they all look the same, need to use your fob to find it in the parking lot LOL.