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  1. #21


    I only have 12500 ml. on my 08, I get 14.7 round town.

  2. #22


    Quote Originally Posted by Magnum View Post
    I only have 12500 ml. on my 08, I get 14.7 round town.

    That's sound right for the LMM.
    2008 GMC Sierra 2500HD Ex. Cab, Fire Red, 6.6L Duramax LMM Equipped with UTG Rocker Pods

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  3. #23


    Keep this thread going, great comments and insight guys.

    10 Chevy Traverse LT AWD
    02 Chevy Trailblazer LS (110K+ miles - loaded except for 4WD - WRECKED!)
    99 Chevy Cavalier LS (105K+ miles - commuter car)
    78 Chevy Suburban Silverado (454, 3/4 ton)
    62 GMC 3/4 ton Pickup (350 police interceptor)

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  4. #24


    Okay then it looks like keeping your foot out of it would be the best way to improve your mpg's. Lets make a list of the best ways to further improve mpg's.

    1. Keep your foot out of it.

  5. #25


    2. Keep your vehicle maintained.
    3. Make sure your tires are at the proper pressure level

  6. #26
    Sr. Apprentice
    Join Date
    Mar 2009
    Ballwin, MO


    I have a stock 2001, and get 16-18 running around town, and 10-12 pulling the camper.

  7. #27
    Join Date
    Aug 2011
    oklahoma city, ok
    Blog Entries


    I have a 2004 duramax 4x4 4door 2500 which i use for a work truck but when im not pulling or hauling any thing i average 20mpg but on the highway i get 24mpg. i have not added any extras or tuned the motor. But i am looking at gettin a 2003 2500hd diesel for an every day driver any one got advice or suggestions?

  8. #28
    Jr. Apprentice Chevyfuzz's Avatar
    Join Date
    Dec 2011
    Central Pennsylvania


    I have a 2003 2500 HD 4x4 Crew w/Duramax 6.6 and average 13-15 mpg. The truck is stock with the exception of 265/75/R16 tires. The only variance I can think of is the high-rise topper over the bed. Pulling the 33' camper drops it to about 10-12 mpg.

    This is my first diesel, but thanks to all the great info on this forum, I re-trained my right foot as soon as I bought the truck. I'm considering buying a tuner, but am very limited on cash. I've read all the previous posts on this thread, and others as well. I'm still not sure what a good tuner is for an entry-level novice who simply wants better fuel economy on his towing vehicle. The truck's not my everyday driver, so I can't justify an expensive unit. Any other low-cost ideas for fuel efficiency is also welcome!

    I agree with a previous post asking to keep this thread going - I'm learning a ton...
    "To all those, who in the terrible heat of battle, pressed forward into eternity. To you who have purchased for us this rich heritage. Forever will your victories echo in the laughter of our children on every playground of this great nation."

  9. #29


    I have a 2013 with the LML Duramax....I get 16 around town.....Hoping for better after a Air Ram Intake, Turbo downtube, and Exhaust upgrade.....well have to wait and see.
    Proud Husband and Father.....

  10. #30


    Anyone have any updates to this thread?

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