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Thread: MPG Question

  1. #1

    Default MPG Question

    2009 Chevy LT Duramax 4x4. Everything including wheels and tires are stock. What should my average MPG be?

    thanks for the info

    Armando
    2009 2500HD 4WD LT1



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  2. #2

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    I would say expect 14 city and 19 hwy
    2002 Chevy Silverado & 1995 Ford Bronco

    02 Silverado: 50K miles, 20" Motto Rims, Flowmaster 50 Series
    95 Bronco: 160K miles, 4" Superlift, 33/12.5/15 Mickey Thompson
    01 Civic: 75K miles, DD
    -Erik



  3. #3

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    Quote Originally Posted by ChromeSilver02 View Post
    I would say expect 14 city and 19 hwy
    The trip computer says. 12.6, 90 percent of my driving is highway. Drove to see my daughter this weekend and did about an 900 mile trip all highway and the trip computer is still reading 12.6. Best Ive seen is 12.7. Are those chip re programmers worth looking into?

    Armando
    2009 2500HD 4WD LT1



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  4. #4

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    I have a friend thats getting 19 hwy. with his 4x4 crewcab Duramax. Yes the programmers do help mpg's alot on diesel engines about 4mpg's. Check out Diablo's Trinity programmer.
    :cool:

    2005 Chevy Silverado Z71 Crew Cab
    6" Skyjacker lift w/Edlebrock dual front remote resoviour shocks, single rear remote. Rancho skid-plate.
    17" x 9" M/T Classic Lock Wheels, 35" BFG A/T or M/T tires
    4.10 PercisionGears w/factory locker, T/A Performance rear-end cover
    Banks CAI intake, ported throttlebody, JBA coated headers, over-sized Magnaflow cats, Magnaflow cat back exhaust, Diablo tuned
    B&M aluminum deep transmission pan
    Warn brush guard w/Warn 9.5 XP winch, PIAA bulbs, Line-X bedliner, AWS Black tool chest, Extang tonneau cover
    Weather Tech floor mats
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    Dash mat cover
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    One black Lab in rear seat.
    :glasses:

  5. #5

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    Quote Originally Posted by Photophix View Post
    The trip computer says. 12.6, 90 percent of my driving is highway. Drove to see my daughter this weekend and did about an 900 mile trip all highway and the trip computer is still reading 12.6. Best Ive seen is 12.7. Are those chip re programmers worth looking into?

    Armando
    The only way to know your true MPG is to track it. I use a spreadsheet for mine but you will need to keep track of the total gallons, miles and the miles between each tankful. You will also need to fill it up and do that several times to know for sure what you are getting.

  6. #6
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    Default

    Quote Originally Posted by Photophix View Post
    The trip computer says. 12.6, 90 percent of my driving is highway. Drove to see my daughter this weekend and did about an 900 mile trip all highway and the trip computer is still reading 12.6. Best Ive seen is 12.7. Armando
    Your mpg computer is stuck Armondo. There was another poster on here several months ago that had his stuck on 15.2, the only change he ever saw was about a tenth. He was going to take it to the dealer & get it reprogramed or repaired but it finally fixed itself. I would check your owners manual to see if there are any specific instructions to correct them when they are stuck.
    1988 Chevy C-3500 2wd (no pic)
    350 c.i. 5.7 L Stock Block, 4 Bolt Mains
    L-31 Vortec Heads, Edelbrock Cam & Intake,
    Holley 650, Flowtech Headers, Magnaflow exh.
    Jet Trans 700R4, B&M Ratchet, 4:10 gears,
    3" susp. lift kit "shadetree"
    No rev limiter, No speed limiter lol


  7. #7

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    Ahh thanks very much, I guess I should have gone to the trucks instruction manual.

    I will look through it this evening

    Thank you
    Armando
    2009 2500HD 4WD LT1



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