GM 3.0L Duramax Diesel Thrust Bearing Problem Causes Engine Failure, No Recall?

testerdahl

testerdahl

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A growing number of owners are reporting catastrophic failures in GM’s 3.0-liter LZ0 Duramax diesel engine and while GM has issued a bulletin about the problem, there are questions on why no recall has been issued. The engine is found in many popular models of GM vehicles like the Chevy Silverado 1500, GMC Sierra 1500, and full-size SUVs. Catastrophic Engine Failure The LZ0 Duramax, introduced as the successor to the LM2 engine, has earned praise for efficiency and torque. However, some 2025–2026 model-year vehicles equipped with the new LZ0 have reportedly suffered catastrophic “grenading” engine failures. According to multiple reports […] (read full article...)
 
Yes, that stinks. The only problem I had heard about this engine in the past was the oil consumption when towing. It’s a great (or perhaps was) option for people who tow a lot and don’t need a one ton.
 
2025 GMC Yukon XL built mid-August 2025, delivered late September. The 3.0L LZ0 grenaded while towing at ~1000 miles due to thrust bearing issue. GM response was excellent, but still, this fiasco could have been avoided if a recall providing crankshaft end play measurements to those who request. The error code and bell housing noise occurred simultaneously with the failure. There would have been no warning and no opportunity to prevent such a mess. Engine was replaced, but now I have to ask myself "do I feel lucky?". I certainly do not want a repeat. One can only hope DMAX is actually measuring the crankcase endplay prior to releasing each engine for installation. What are the odds??

If you tow, even a lighter trailer, it would not be unreasonable to be concerned for your engine. Certainly, the stress of towing brings on the failure faster and leads to very little warning. You may want to avoid travels to locations with few GM service centers, until you have a few thousand miles on the engine. Give yourself an opportunity to get the code or hear the noise.

There also seems to be a cone of silence placed upon the dealerships. None that I called (total of 4) to investigate the code P06D even mentioned the Technical Service Bulletin. You seemingly can only get them to talk about it if you ask direct questions. I understand the need to protect sales, but at a certain point that silence needs to stop - it will only lead to more catastrophic failures.
 
JPOL said:
this fiasco could have been avoided if a recall providing crankshaft end play measurements to those who request.
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That's my frustration as well. Why not just recall all of them, do the measurement and then replace those that fail?? That's not unheard of in automotive and automakers do it all the time. I raised that exact same point in the video I did on this issue.
 
testerdahl said:
That's my frustration as well. Why not just recall all of them, do the measurement and then replace those that fail?? That's not unheard of in automotive and automakers do it all the time. I raised that exact same point in the video I did on this issue.
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Being as I have not owned a GM since a 2000 Astro, which we loved, I have no dog in this fight but from the outside, it always seems like GM goes kicking and screaming to the "recall solution". Ford issues them on a daily and Toyota seems to be rather liberal as well. Ram kinda shrugs and seems more confused that anyone even has an issue. "Lifters? What lifters? First we heard about it."
 
I have a 2025 Tahoe RST 3.0 Diesel, it has 2604 miles on it, and it is setting in the dealership waiting for a new engine right now. The crank shaft broke loose, and the Reduced Acceleration warning came on, and the engine light came on. They called and said I needed a new engine and told me this is the 3rd one in the last month they have replaced. I am so frustrated. They should just recall all of these. I have had mine 3.5 months and this happens.
 
After GMC recalled the 6.2 L engine I traded in my wife’s 2023 Yukon Ultimate 6.2L for a 2025 Yukon ultimate 3.0 L diesel. Last month with 4000 miles on it she got the engine warning light and reduced acceleration warning. The vehicle has been in the shop now for over a month getting a new engine. The shop told me we’re not the only one in there. She loves the Super Cruise feature and now we’re in a quandary. 1. Do we stick with this repaired vehicle. 2. Take the Lemon law buy back. Or 3. Swap for a new 2026 Yukon Ultimate.
 
LakeLife said:
After GMC recalled the 6.2 L engine I traded in my wife’s 2023 Yukon Ultimate 6.2L for a 2025 Yukon ultimate 3.0 L diesel. Last month with 4000 miles on it she got the engine warning light and reduced acceleration warning. The vehicle has been in the shop now for over a month getting a new engine. The shop told me we’re not the only one in there. She loves the Super Cruise feature and now we’re in a quandary. 1. Do we stick with this repaired vehicle. 2. Take the Lemon law buy back. Or 3. Swap for a new 2026 Yukon Ultimate.
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A friend I went to middle school with is in the same quandary. He lemon lawed a 2500 truck then got the 3.0L Duramax again. At 3,300 miles the engine blew with the thrust bearing issue. He loves the MPG, like I did, and the engine, just frustrated as hell with back to back GM engine failures. Understandable for sure.

Does he buy a different model, switch brands?? Chalk it up as a run of bad luck? He’s in Michigan too, born and raised so his view on things is the Detroit 3 or nothing.
 
testerdahl said:
A friend I went to middle school with is in the same quandary. He lemon lawed a 2500 truck then got the 3.0L Duramax again. At 3,300 miles the engine blew with the thrust bearing issue. He loves the MPG, like I did, and the engine, just frustrated as hell with back to back GM engine failures. Understandable for sure.

Does he buy a different model, switch brands?? Chalk it up as a run of bad luck? He’s in Michigan too, born and raised so his view on things is the Detroit 3 or nothing.
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Has there been any published information about changes to the design on the 3.0 for model year 2026? I’d hate to go back out and buy the exact same engine again and experience this for the third time.
 
LakeLife said:
Has there been any published information about changes to the design on the 3.0 for model year 2026? I’d hate to go back out and buy the exact same engine again and experience this for the third time.
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Nothing official has been published as far as I know. It is rare for automakers to publish changes though IMO. It is all about lawyers and lawsuits.

IMO - the engine was great for a while and now there is obviously a bad part that is causing some problems for people. It seems to me to be an easy fix for GM to isolate the bad quality issue for the part, correct it and supply a better quality part whether it comes from them or a supplier. I can't imagine they would need to redesign an engine to fix a bad part, but hey maybe they do?
 
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