How much trust do you have in the 3.0?

Good looking GSD. I have Irish Wolfhounds, thus the Suburban. LOL Two adult girls and a five month old, 90 # boy.

Padraig

Padraig said:

Good looking GSD. I have Irish Wolfhounds, thus the Suburban. LOL Two adult girls and a five month old, 90 # boy.

Padraig

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Oh Man! I have seen pics and had never seen one in person. Not your everyday dog! I was at a St Patricks day parade and a ******* had several full grown wolfhounds. They are GIGANTIC! LOL Suburban with 2nd and third row down no doubt!!

My trust has wained a little bit with the 3.0 LM2..

TollKeeper said:

My trust has wained a little bit with the 3.0 LM2..

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This video has been discussed on most of the diesel engine forums. Most of the comments from the gearheads are there isn't any engine history, maintenance records, and they all commented that GM won't warranty the failure. Most of them suspect it was chipped, which GM can see in the ECM, there is a fingerprint left when you change any parameter in the ECM. Since there isn't any information other than it was blown, GM won't warranty it, the gearheads all say this should would not steer them clear of it. I have to agree, if GM won't warranty it, you should be asking what was done to it that caused the failure. The only time I have seen aluminum pistons do that, it was chipped, which causes the aluminum to either become deformed, and even cracking one of pistons due to the high temps.

I don't even know why someone would post this video? It isn't pertinent to the real world most owners live in. This engine was over stressed or got a drink of gasoline or something of that nature....

Just another "Clip" to downplay what is the most dependable engine available in these vehicles.

StephenPT said:

.The only time I would say to reconsider your engine choice and NOT get the LM2 is if you do A LOT of idling (builds up soot faster in the DPF) or do a ton of short trips. DPF regens take about 10 miles and need to happen ~every 300 miles. It's good to get the motor out and everything up to temp. . .Frequent short trips aren't good for any motor, gas or diesel - with the newer emission diesels being a bit more finicky about it.

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31k grocery getter miles on my 2021 Tahoe Duramax and no problem with DPF soot. Sure, it goes on and off, but it's over with fast and does not affect anything. I spoke to the regional service manager about replacing the DPF at 60k and she has not seen replacements before 100k here in eastern Mass (short trips in traffic all the time). Of course she's a GM rep, but I know five LM2 Sierra owners and they report no problems.