Engines - How many have the Duramax?

[SmittysAT4]

Thrust bearing is failing on the LZ0. Happens mostly before 15k miles.

Okay....... I have been hearing about this... Fingers crossed, I am at 7K and looking for 15K plus...........................

 

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[Far]

Very happy with the 3.0 in my 2025. 19k miles no troubles.

 

[remmy]

‘26 AT4 XL with the babymax. Just ticked over 1,200 miles and am preparing for this. I plan on changing oil every 3k-4k miles and will send out samples to Blackstone Labs on every change. 7k mile oil changes is crazy to me.

 

[WVjoe13]

I agree... the 3.0 babymax rocks.. even here in WV where it gets a little steep at times. I have a 25' with 19K on it so far so good!

 

[ivey_usmc]

2025 3.0 with 26k love it!

 

[remmy]

I’m about to change my oil. Just ticked over 3.5k. I’ll post lab results when all that goes down.

 

[chc01a]

My 2025 Yukon XL made it 6500 miles before it came apart.

 

[Oncewas]

I'm at 15k I'm going to Palm Bay, FL 436 round way trip before I head to Yellowstone for the summer a one way 2k trip. Last year I drove 9k miles round trip. I'll be pulling my 22 ft camper just like last year. Not sure how long this trip will be but I'm sure it will be at least 5k if not more.

 

[Shep]

2024 AT4 3.0 Duramax with 36k miles. It's a great truck, Drives great, torque is awesome. No issues!

 

[remmy]

Changed my oil for the first time today at 3600 miles. First time doing a diesel too. I gotta say, that oil was BLACK, yall weren't kidding! Haha. Honestly no different than gas. Drained for 30 minutes, reinstalled bolt, pre filled filter, screwed it on and filled the crank case. I didn't run the motor for a second with the oil cap off that I usually do with gas engines though. I don't know if it would burp anything out and didnt want a mess. For you all with long term diesel experience, do you replace the fuel filter every time for good measure? Onboard diagnostics says its fine for quite awhile.

Used 7qts 02w-20 Mobil 1 ESP X2 DexosD and accompanying filter M1-115A. Mobil 1 is my usual weapon of choice which is why I went with it. These aren't race cars or museum pieces so I'm sure any brand is fine as most are these days.

That aluminum pan is thin to me. However there is a lot between that and the road so i don't fear it being hit. The nut comes off without a fight and actually doesn't make much of a mess surprisingly. Because of that pan I don't recommend cranking it down because the aluminum threads will strip easily judging by the feel and what the factory torqued it to as well.

I will admit its really nice to lift up the air suspension so I can craw under it easier. No, I'm not a moron, I put in jack stands incase. I have a couple of old Range Rovers on air too and I don't trust them either.

Sent off sample to Blackstone and Ill report my findings.