2027 3.0 l Duramax

[Sparky134]

Will the the engine be engineered to solve the problems plaguing the 2019-2026 Engines?

[newdude]

54 minutes ago, Sparky134 said:

Will the the engine be engineered to solve the problems plaguing the 2019-2026 Engines?

 

 

What problems?  

[Atlas]

55 minutes ago, newdude said:

\What problems?  

 

Just a guess based on the mentions I've seen on this forum...

 

Failing coolant control valves (LM2, LZ0)

No start / long crank issues (LM2)

Thrust bearing failures (LZ0)

Timing chain failures (LM2)

 

Fingers crossed GM has more revisions and updates in the work because the 3.0 is awesome (when it can be trusted).

[newdude]

1 hour ago, Atlas said:

 

Just a guess based on the mentions I've seen on this forum...

 

Failing coolant control valves (LM2, LZ0)

No start / long crank issues (LM2)

Thrust bearing failures (LZ0)

Timing chain failures (LM2)

 

Fingers crossed GM has more revisions and updates in the work because the 3.0 is awesome (when it can be trusted).

 

 

...was looking to see what the 3 post OP had to say since they've got a personal issue here and 3 different threads they made within the same time period...just today....and then regurgitating that some owners on facebook and other forums have issues which is a small number out of total ownership of 3.0 Duramaxes.  

 

 

 

 

Edited June 15 by newdude

[silveradosid]

i would say it is someone who bought a deisel and shouldn't have, they arenot meant to put around town or excessive idling. the brake thing is a gm problem, some do worse and some do bettter. i put 140k on my 2014 and was expecting the same on the 2020 but only got half of that mileage. a2020 with40k is not that many miles, my 2020 has 120k

Edited June 15 by silveradosid

[Jus Cruisin]

I'll be buying another 3.0l when I replace my 2025 Sierra. I had an issue (engine siezed) but it was replaced and has been fine ever since. I'm spoiled with the excellent fuel economy to swap to a 6 2l or its replacement. 

[Coastie05]

One can only hope that they will correct or have already corrected the issue. 

[Sparky134]

On 6/14/2026 at 6:38 PM, newdude said:

 

 

Thrust bearing, turbo oil filter….What problems?  

 

[jl6690506]

On 2026/6/15 at AM5点43分, Sparky134 said:

该发动机的设计能否解决 2019-2026 年款发动机所面临的问题？

It's too early to say. The 2027 3.0L Duramax is based on the LZ0 engine with ongoing improvements, but there's no evidence yet that it has completely resolved all the issues seen in the 2019–2026 models.

[diyer2]

I would only own a diesel if I towed regularly.