Fuel milage

[Airstream]

Looking at new 2500 Duramax.  Anyone have any mpg info for the 4 wd. I have a 03 2wd Duramax now that gets 23mpg at 70.

[ssowie]

On the highway it’s about the same with no load. 23-24mpg in my 3500 srw. However in mixed driving I get about 13-14mpg.


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[Airstream]

Tks. Just trying to get an idea.

[migrabill]

I have a 2020 GMC Sierra 2500 HD with the Denali package and the Duramax diesel. I get 21 on the highway and 17-18 in the city.

[cNate]

I climb a 6% grade everyday for work and it’s about a 15 mile round trip at 12.5 MPG no load. I have also towed a 9k lbs trailer for about half the 9k miles on my truck. I’m averaging 13 MPG over those 9k miles. If I’m driving with no inclines and on highway without a load, I can get 24 MPG. Mixed highway and city flat surfaces 19 MPG.


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