The Most Reliable Duramax Diesel Engines ...

JayceeP said:

Only thing I don’t like about this 3.0 Diesel in my 2024 Yukon XL SLT is trying to pass on the highway, particularly single lane roads. It feels a bit gutless when you really need it to pull. I’m not sure if the gears with the max tow package negatively impact that?

Around town it’s very peppy and the torque, both around town and on the highway, is phenomenal but I really don’t have a ton of confidence when I need to juice it past a transport truck or a line of 2-3 slow moving cars on a single lane 100kph/60mph highway (we have quite a few areas in rural Nova Scotia where we have some single lane highways).

My F150 with the 2.7 Ecoboost (soon to be traded in for the 3.5) is a completely different highway experience as far as passing acceleration goes.

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StephenPT said:

The gearing in the 21+ SUVs is 3.23 - doesn't matter which engine or options (max tow).

But to your point, it's only 277hp - that's not a lot of hp for a full-size SUV and compared to the 6.2L which pumps out 420hp. It won't have that high end punch for passing.

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Padraig said:

I have approximately 18,000 miles on my Suburban with the Duramax. I love this engine. Hauls my 6,000# boat with no problem and is also great on a road trip. I have a heavy foot but still gets 27+ mpg. If I drive the speed lit I get 29/30 mpg. As far as passing... usually no problem although not as much punch at 60 as 40 mph. Passing a line of cars I have it at the mid 90s. Haven't driven a 6.2 so can't comment. It does compare favorably with my old 5.3.

Padraig

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