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TGR35qba's avatar
TGR35qba
Explorer
Jul 13, 2018

GMC Sierra 3500 diesel dually MPG

I’m thinking about buying a truck and a 20k 5er, and wanted to get an idea of mpg.

If I’m traveling on the highways at 65 mph, do you have an idea on the mpg I might get. I’m hoping others have a similar setup, and might be able to share their experiences.

Thanks in advance
Tow Vehicles
  • dennis1's avatar
    dennis1
    Explorer
    Jul 13, 2018
    Mine 2007 classic before DEF. 23 empty and 13 with 3k truck camper.
  • N-Trouble's avatar
    N-Trouble
    Explorer
    Jul 13, 2018
    I’m goimg to say less than 10 pullimg a 20k lb 5er. Also if a newer emissions equipped model there seems to be a lot more variation in MPG from truck to truck even of the same brand.
  • cfuller3's avatar
    cfuller3
    Explorer
    Jul 13, 2018
    Touching on 12 if soft footed, but agree that you can count on 10 and be in the ballpark. With some mild breathing mod's and tow chip, I get 23 empty, honest and on plus side, again, soft footed. 2008 3500 Dodge dually.

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