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  1. #1
    Sr. Mechanic
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    Default Random Question!!

    Okay, so the other day I was thinking about my fuels gauge and trying to figure out why my truck would read considerably more than half a tank of gas when the Fuel Consumed indicator on my DIC would read 13.0 gallons used (which would be exactly half a tank since I have a 26 gallon tank). I reset all my DIC stuff like fuel used, gas mileage, trip meter, and the hours every time I fill my truck up, and I do all of this before starting my truck up at the pump so nothing has been used.

    The only thing I can think of is the leveling kit has got the front of the truck sitting up (level) with the back and that has got the sensor thrown off since it does not have the factory rake. I know when you park you truck on an upslope the fuel gauge reads more and it reads less when on a downslope.

    So is the leveling kit the reason for the fuel gauge reading higher? The only reason I picked up on this is because when I drive I typically leave the DIC on Fuel Consumed so I just noticed that it was telling me 13 gallons was gone but the fuel gauge itself was reading way closer to the 3/4 line instead of 1/2 line.

    07 Silverado 1500 5.3L extended cab
    4" Rancho Suspension lift with Adjustable Shocks
    2" Leveling kit
    1.5" Zone Offroad body lift
    35x12.50 R 18 Nitto Trail Grapplers
    Ranch Hand Grille Guard
    Ranch Hand Rear Bumper
    Tow mirrors
    Color matched grey/silver Bushwacker fender flares
    Dual exhaust from cats back with X pipe coming out 5" tips
    Black Tool box
    Edge CTS Programmer
    Proliner Spray in bedliner
    20% tint all the way around

  2. #2

    Default

    My truck sits a little higher in the front, if my gauge reads 1/2 tank and I fill it, I'll put in 18-20 gallons (my tank is 26gallon) so according to the gauge I should put just 13 gallons in.
    :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
    Cover-Craft seat covers
    Dash mat cover
    Formula One window tint
    One black Lab in rear seat.
    :glasses:

  3. #3
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    Default

    Reb, you can prove if your theory is correct, & fairly easily too. Just jack up the rear the exact same amount that the leveling kit lifted the front & check the fuel guage.
    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


  4. #4

    Default

    The top "half" of the tank has always been much bigger on Chevy pickups, every generation.
    When you hear hoofbeats, look for horses not zebras.

  5. #5
    Legend

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    Red Wing, Minnesota, United States
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    Default

    There is no car in the world that when the indicator reads half it is truely half. Its just the way it is, if it was actually at half then your indicator would NEVER go past FULL when you FILL it. I dont know why a car company cant get it right but thats the way it is.
    99 K1500 Suburban LT "THE BEAST"
    Hypertech III, K&N, true dual
    285/75/16
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  6. #6

    Default

    Quote Originally Posted by 2COR517 View Post
    The top "half" of the tank has always been much bigger on Chevy pickups, every generation.
    Ya I can attest to that....the first half of tank of has seems to last awhile but once I hit that half mark out seems to disappear quickly!


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  7. #7
    Sr. Mechanic
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    Default

    I know the second half has always gone faster, it just seemed to have gotten worse after the front end was raised. I can say this, it takes less than 2 gallons to move the needle from 1/2 tank to 1/4 tank and then it slows down again.

    07 Silverado 1500 5.3L extended cab
    4" Rancho Suspension lift with Adjustable Shocks
    2" Leveling kit
    1.5" Zone Offroad body lift
    35x12.50 R 18 Nitto Trail Grapplers
    Ranch Hand Grille Guard
    Ranch Hand Rear Bumper
    Tow mirrors
    Color matched grey/silver Bushwacker fender flares
    Dual exhaust from cats back with X pipe coming out 5" tips
    Black Tool box
    Edge CTS Programmer
    Proliner Spray in bedliner
    20% tint all the way around

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