03 1500HD 4x4 Crew

Discussion in 'Member Introductions' started by bfmac1958, Sep 6, 2008.

  1. bfmac1958

    bfmac1958 New Member

    Hey, I've got an 03 1500HD 4x4 Crew
    K&N dropin filter, magnaflo two in two out muffler and superchips tuner.
    Still only getting 10 to 12 mpg average . Is that about right ? Thanks
  2. bfmac1958

    bfmac1958 New Member

    sorry, the HD has 6.0 motor with no other mods. thanks
  3. bfmac1958

    bfmac1958 New Member

    Hey, about a month ago I got a GM replacment intermediate steering shaft for $75. Simple fix for annoying rattle
  4. ChevyFan

    ChevyFan The Sheriff Staff Member 5+ Years 1000 Posts

    Posts were moved to their own topic
  5. 04sierracrewcab

    04sierracrewcab Epic Member 5+ Years 1000 Posts

    that sounds kind of poor for the mods you have . have you ever replaced the fuel filter????
  6. retired2001

    retired2001 Epic Member 5+ Years 5000 Posts

    From what I remember, the HD 1500 4:10 gears. What your getting is probably pretty close.
  7. Calbaby968

    Calbaby968 Rockstar 100 Posts

    Welcome to the site. A friend of mine has the 6.0 and gets about the same mileage. You could do a throttle body spacer to help out. 80mm Mass air sensor and 80mm throttle body, if it's not stock on yours. I wanna say it might be though. Only other advice is slow starts and watch how much you press the pedal down for lane changes and passing. That will suck it right out.
  8. dwill3015

    dwill3015 Epic Member 5+ Years ROTM Winner 1000 Posts

    Welcome to the site!
  9. MWright936

    MWright936 Epic Member 5+ Years 1000 Posts


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