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  1. #11
    Sr. Engineer marko54's Avatar
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    Quote Originally Posted by Bern1982 View Post
    i get better mpg on the highway but back and forth to work everyday is hills and city and i've been getting about 11.3 mpg. i wasn't sure if putting a catback exhaust or a cold air intake would help much
    Have you thought about a programmer/tuner. I saw a big difference installing the Edge CS.
    2007 Suburban 2500 Edge evolution CS leveled 265 goodyear Silent Armor Pro Grade Kenwood DNX6180 Nav.Radio





    OH Goody, another Pickem up truck dripping with Chrome Crap!

  2. #12

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    you said u were triping over 100k miles. i would look at your 02 sensors and see how they are looking. i changed mine and noticed about another 20 miles per tank so long as im taking it easy.
    2000 single cab short bed 1500 w/ 6.0 vortec maxx swap from a 2006 2500, custom intake, slotted brakes, shorty headers, 8mm wires, electric fan, strait piped, 4.5 inch lift, asp pulleys, true dual through body exhaust, built trans w/ shift kit, custom tune ... 320rwhp

  3. #13

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    Quote Originally Posted by marko54 View Post
    I sure hope you are not getting 11mpg with a 6.0 on the hiway! My 07 suburban 2500 with the 6.0 gets atleast 18.5 to 20 on the hiway and in city i avg.
    13.9 and up. I keep my fooy out of it and drive no faster than 64 mph and have my Edge CS set at level 2 Economy. I have gotten 20 mpg on a decent trip.
    what were you getting before the tune?

  4. #14
    Sr. Engineer marko54's Avatar
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    Quote Originally Posted by Bern1982 View Post
    what were you getting before the tune?
    I got no less than 2mpg. better on hi-way and at least 1-1.5 mpg. better on the streets with the edge. Keep in mind my suburban is adult owned and adult driven. i stay below the speed limit and take off from the red lights easy.

  5. #15

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    You can't compare the new 6.0's with the old 6.0's. These new ones have the active management that automatically shuts off 4 cylinders when you don't need the power. Thats how you are getting such better gas mileage.

    2006 Duramax LBZ
    Edge Evo
    4'' Diamond eye to 6'' tip
    16'' ion alloy, 33'' fierce attitudes
    Lots of work left to do!

  6. #16
    Sr. Engineer marko54's Avatar
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    Quote Originally Posted by ntbush83 View Post
    You can't compare the new 6.0's with the old 6.0's. These new ones have the active management that automatically shuts off 4 cylinders when you don't need the power. Thats how you are getting such better gas mileage.
    I have a 3/4 Ton 2500 Suburban there is no active fuel mgmt. on this model, the 6.0 in the half ton model does.

  7. #17

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    Time for a tune up in my opinion. Run some sea foam through it, change the spark plugs & wires, Oil, Clean your MAF sensor etc. etc.
    Bagged 06 Silverado Crew Cab.

  8. #18

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    Quote Originally Posted by marko54 View Post
    I have a 3/4 Ton 2500 Suburban there is no active fuel mgmt. on this model, the 6.0 in the half ton model does.
    my 2011 2500HD Crew Cab 6.0 does not have active fuel management. Iwish it would have been available.

    I get 13 mpg by the DIC!
    Last edited by jake's silverado; 05-10-2011 at 03:20 PM.

  9. #19
    Sr. Engineer marko54's Avatar
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    Quote Originally Posted by jake's silverado View Post
    my 2011 2500HD Crew Cab 6.0 does not have active fuel management. Iwish it would have been available.

    I get 13 mpg by the DIC!
    I hear you, i guess from a GM / Engineer's point, any of their trucks with 2500/HD specs. are usually for work/towing. Especially with a Suburban. 3/4 Ton running gear in aBurb. would be for towing thus i cant see active fuel mgmt. in the 3/4 ton. not much towing capacity with 4 cylinders

  10. #20

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    I hit 18.7 mpg driving 60 on the highway after refueling last week. Average highway is 15-16 and around town is 13, thats driving very conservative of course. I do drop to 10-11 driving like a 16 yr old when my 6 yr old son says "go faster or that guy wants to race" lol

    Only mod is a drop in k&n filter. no more tonneau cover. I do make sure tires are at 60 psi front and 70 back per my manual.

    2011 GMC Sierra 2500HD SLE 4WD/Z71 Crew Cab Gray Green Metallic 6.0 Gas 6spd Auto 3.73 gears, HD locking rear differential. 18"Alum Wheels (Stock) Stock Michelin LTX AT-II Tires, Banks Monster Exhaust, Westin Platinum SS Oval Step Bars, EGR Window Deflectors, Extang Trifecta Tonneau, Front and back Weathertech Digitech liners. Factory Remote Start with Onstar App on iPhone.

    2003 GMC Envoy SLE Black 4WD 4.2 175,000 Miles all original drivetrain and runs like a champ and no rust or rot!

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