Anyone own or work on vehicles with the 3.0 duramax? Thinking about getting one partly for the fuel mileage and also because frankly it seems pretty cool, so just curious what others experiences are.

I hear great things.

Haven't such driven one but everyone i know that has one loves it. I'm very tempted.

Had one for a little over two years. Absolutely loved it and by far the best half ton engine I've ever had.

Wife has one in her 2024 tahoe purchased last January. So far, we are very happy with it.

My father has about 70k on his Denali with the 3.0. No issues to speak of.

Any opinions on the LM2 vs LZ0 on the trucks? Debating on waiting for the 25s suburbans to get them this spring or grab a discounted 24 on the lot right now with the LM2s.

I didn't realize the 2024 suburban had the LM2. I thought all of them had the LZ0 now. Good to know. One of the salesmen we talked to at a dealer in DFW said the 2025 suburbans with the Duramax's wouldn't come out until March or April. Not sure if that was a sales tactic, but I think I would rather have the LZ0. I've watched videos talking about oil leak issues in some of the first iterations of the LM2, so that made me a little leary. It seems like they have the kinks worked out with the LZ0. I'm not a mechanic though so I may not be the best one to speak to this. One of the salesmen at a dealer yesterday mentioned something about the 3.0 duramax and a coolant valve issue. I've heard horror stories about the Ram issues a few years ago so that made me a little nervous, but I've always been a GM guy and the 3.0 Duramax seems pretty cool and I've heard good things in general. I'm thinking I'll get one within the next year. I fill up my wife's van twice a week, so being able to go much longer between fill ups is a big selling point for me.

You hit the mark regarding known issues with the LM2. I had the oil galley leak which was fixed.

One thing I wish hadn't done was the small lift and off road tires. I lost 5-7 mpg with this set-up. Otherwise, I love the drive, which is quiet and smooth. Also, you'll love how it pulls if you choose to.

watching

I saw yesterday that March 3 is when orders open up for the LZ0.

That's pretty sweet. Is that the RST?

It is

Got almost 30k on a 24 sierra. I'm very happy with it. Power is good, average about 25 mpg, can get 30 on the highway.

I've driven one since 2020 and put around 60k miles on it and haven't had a single issue other than almost running out of DEF (my first stupid DEF truck). My wife is wanting an SUV and I'm thinking hard about getting a diesel for it as well.

nortex97 said:

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The thing to be aware of is that diesels really aren't the best 'grocery getter' engines if you're putting them to that duty for short haul trips. It's the higher compression/needing to actually warm all the way up when used etc. that means you will have increased long term maintenance for things like gaskets/urea exhaust systems etc. if you plan to use them for that.

I love diesels but when I see them used that way I wince a little on the inside.

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Hmmmm. My wife is leaving her job at the end of the year. She'll lose her company car so we are going to sell my Ram and had planned on getting her a 2025 Diesel Tahoe. I tow a boat regularly and we are planning on getting a small travel trailer next year but most trips will be 5 miles or less the rest of the time

Yeah we have a fair number of short trips.

Another question: does anyone on cold weather environments have issues with the diesel gelling up? If I buy one, that is another question I've had as we usually go up to the mountains some in the winter where the Fahrenheit temps can go negative sometimes.

You shouldn't really have issues with gelling until the temps get well below 0. If you're expecting lower than that, just add Power Service (white bottle) to the fuel.

They are awesome for towing. Not an attack it's just that diesels do well under load for a period of time. Mechanically or from an engineering perspective that compression ratio and need for "pure" fuel and great lubrication and cooling doesn't transmit to grocery trips long term.

FIDO*98* said:

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nortex97 said:

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The thing to be aware of is that diesels really aren't the best 'grocery getter' engines if you're putting them to that duty for short haul trips. It's the higher compression/needing to actually warm all the way up when used etc. that means you will have increased long term maintenance for things like gaskets/urea exhaust systems etc. if you plan to use them for that.

I love diesels but when I see them used that way I wince a little on the inside.

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Hmmmm. My wife is leaving her job at the end of the year. She'll lose her company car so we are going to sell my Ram and had planned on getting her a 2025 Diesel Tahoe. I tow a boat regularly and we are planning on getting a small travel trailer next year but most trips will be 5 miles or less the rest of the time

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Had one for 3 years and it was fine for short trips. Multiple runs of less than a mile to get to kids from the bus stop and things like that. The no short trips in a diesel mostly applies to the heavy duty versions, mainly because the long burn time needed to clear the larger DPF. Think about it, small diesels are in tons of small European cars that are used for low mileage runs every day.

I just got an excursion and told my wife if she ever puts gas in it I might leave her. It goes 600 miles on a tank so highly unlikely she will ever fill it. But it is a fear I have.

Just the other day I was filling up and instinctively grabbed the wrong handle. Knew it right away but still freaked me out a bit

It's not the first 3 years that really will have an impact on maintenance/service. For those curious about costs and mechanical impacts longer term of a vehicle in this size class it's worth weighing the considerations.

Regarding Europe, tiny diesel engines (often 1.0L or less) many times without urea treatment systems, heat up much quicker and are still losing market share tremendously due to the emission requirements and attendant performance and durability impacts over the past 20+ years. This is unlikely to reverse course, as the European mfg's themselves project. Again, from a purely engineering perspective diesels are unattractive engines for grocery getter duty, anecdotes/personal preferences aside.

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Again, from a purely engineering perspective diesels are unattractive engines for grocery getter duty, anecdotes/personal preferences aside.

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Disagree completely for this size vehicle. And you really didn't disprove anything with a random blog post. Small diesels have been used forever there without issue for low mileage use, their popularity not withstanding.

ElephantRider said:

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If I got my wife a diesel, she would 100% fill it up with unleaded within the first month

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We're good friends with the owner of Chevy Marble Falls. He told us they get about two a month in for this. His wife gets a new Tahoe every 6 months, but won't get her a Diesel

Teslag said:

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Quote:

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Again, from a purely engineering perspective diesels are unattractive engines for grocery getter duty, anecdotes/personal preferences aside.

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Disagree completely for this size vehicle. And you really didn't disprove anything with a random blog post. Small diesels have been used forever there without issue for low mileage use, their popularity not withstanding.

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Your anecdote didn't prove anything either, 'counselor.' Your absolute lack of both an engineering background or mechanical one, is showing.

I was actually a diesel mechanic way back in the day (yes, in the army reserve). The simple point of fact is that diesels long term have to be treated differently due to the warm up and cool down cycles inherent in them (and much higher compression ratios), or there will be reliability/maintenance issues. People who know anything at all about engines have been aware of this since the compression ignition engine was invented. Properly cared for/in long haul towing applications etc. such as 18 wheelers they can absolutely go into the 7-digit mileage world but short haul trips are a higher wear and tear application for them in particular. The EGR, DPF, turbo and cost to replace the fuel pump are 'issues' to be aware of when getting these.

Please note to other readers, I am not posting this to debate this poster, just to share this info if making a decision yourselves.


Have a nice day.

I have a 24 LZ0 AT4 that's about to hit 11k miles. Drives great, efficient, power is there, etc

So the BMW 328d's were only to be used as tow vehicles? And the diesel side by side ATV's?

I CANNOT FUND A 2025 YUKON WITH A DRISEL MOTOR .

DIESEL

2025's are getting the LZ0 and I don't think the order bank is even open on them yet

Teslag said:

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So the BMW 328d's were only to be used as tow vehicles? And the diesel side by side ATV's?

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I don't feel a need to mock anything about BMW long term reliability/maintenance costs. I believe they discontinued all diesels in North America years ago, but whatever. Euro 7 means diesel sales in Europe will continue to plummet.

It, as well as ATV's and whatever other topic you want to conjure up as something you perceive I have a duty to address, really has no relation to the 3.0 duramax discussion.

Again, to sane readers, I love diesel engines, and have always wanted one personally to be frank, but it would have to fit the use case and just wanted to share some feedback/considerations in a non-fanboy way. The LZ0 is certainly a 'fix' for some of the many of the issues they have had in the 3.0, and if one is getting a diesel chevy I would certainly recommend this improvement (if looking at used/first gen models as well).

You didn't address anything about short trips in small diesels, which have been used for decades for that purpose. And still are.