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2009 & Up HD 2500 Gas Mileage

Discussion in 'Chevy Trucks' started by Cosmic Charlie, Jun 10, 2011.

  1. Cosmic Charlie

    Cosmic Charlie Senior Member
    Messages: 228

    Thinking of trading my 2004 HD 2500 gas & 07 Avalanche LTZ for a 2009 or newer 2500 HD LTZ Gas ... and drive it daily

    What kind of mileage should I expect combined, and on the highway at 75 mph ?

    probably not to great - I hope better than my 04 HD 2500 ? 13-14 mph

    My Av gets about 17 mph on the highway which is not bad in my book

    What would the diesel give me on the highway ?

    Thanks
     
  2. 06slvrctd

    06slvrctd Member
    Messages: 55

    My 2010 crew cab 6.0 gas gets 14-15 on the highway at 70-75. At 65mph I have gotten 16, but I can't stand to go slower for 1-2mpg.
     
  3. 00bluegtp

    00bluegtp Member
    Messages: 71

    how is this possible? my 02 2500hd 6.0 gaser gets 17-18mpg on the highway. is it possible that they are getting worse?
     
  4. Raconteur

    Raconteur Senior Member
    from MA
    Messages: 138

    I get 16 on the highway @65mph
    combined with mostly around town driving it's never better than 10 mpg
     
  5. RedArrow

    RedArrow Member
    Messages: 50

    I watch my mileage way to much...04 2500HD 6.0. Combined I get 12.7 while on the toll roads at 70 I get 14.6. This is after the blackbear tune which added 2 to my highway and 1 to around town. I do have 285's on which cant help.
     
  6. 06slvrctd

    06slvrctd Member
    Messages: 55

    My 03 got 12 at best, so I was thankful for the new 6 speed trans and 3.73 gearing to achieve better mileage.
     
  7. South Seneca

    South Seneca Senior Member
    Messages: 474

    My '01 got 12 empty on a trip when I bought it a few years ago. We did a tune up on it after a "service engine" light came on. Hopefully the mileage is better but I don't travel with it.
     
  8. RedArrow

    RedArrow Member
    Messages: 50

    I have heard a couple guys with numbers like this and have always found that their rear-ends were something different than the typical 4.10 gear. I am turning about 2400rpm at 75.Thumbs Up
     
  9. Cosmic Charlie

    Cosmic Charlie Senior Member
    Messages: 228

    I just bought a 2011 Sierra 2500 HD LT(z) kinda, Extended, 6.0 Gas, 6.5 bed, 6 speed, Black with Black Leather, Nav, ... 18" wheels 4.10 rear end

    On the Highway at 75 MPH with cruise for 45 miles
    From 500' elevation to 1200' elevation I got 14.5 MPG
    From 1200' elevation to 500' elevation I got 15.5 MPG

    Around town/combined I get 13-14 MPG

    Nice Truck - Daily Driver

    2011 Sierra-1.jpg

    2011 Sierra-2.jpg
     
  10. mayhem

    mayhem PlowSite.com Addict
    from Peru MA
    Messages: 1,016

    I'd ask you the same question...how the heck is 17-18 possible in 2002 6.0 under ANY conditions?

    I get really amped up in the spring when they get rid of the winter blend gasoline and mu mileage breaks the 13mpg barrier. With the 4.10 gears in my truck it doesn't ever seem to matter how I drive...city, highway, carrying a load of wood...as long as the plow isn't on the front end I get about 12mpg, I've never gotten anywhere near 15. under any circumstances.
     
  11. Invapd

    Invapd Junior Member
    Messages: 16

    My 2011 2500 HD gets between 9-11 mpg. It sucks! I have 4,700 miles on it.
     
  12. Cosmic Charlie

    Cosmic Charlie Senior Member
    Messages: 228

    I now have 22,000 miles ... Around town/combined I get 13-14 MPG
    I drive 75 mph on the highway always, which is about 80% Highway overall ...

    (SNIP)
    I just bought a 2011 Sierra 2500 HD LT(z) kinda, Extended, 6.0 Gas, 6.5 bed, 6 speed, Black with Black Leather, Nav, ... 18" wheels 4.10 rear end

    On the Highway at 75 MPH with cruise for 45 miles
    From 500' elevation to 1200' elevation I got 14.5 MPG
    From 1200' elevation to 500' elevation I got 15.5 MPG

    Around town/combined I get 13-14 MPG

    Nice Truck - Daily Driver