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Thread: Fuel Gage

  1. #1

    Default Fuel Gage

    My 1995 C2500 (Diesel)fuel gage jumps around alot especially after the fuel burns down alittle. I suspect the sending unit.Any thoughts. I know I need to drop the tank down to check/replace. Any advice on dropping the tank and changing the sending unt would be appreciated.

  2. #2
    Jr. Apprentice
    Join Date
    Apr 2011
    Port Perry. Ontario, Canada


    I have changed a coouple of fuel sending units on gas engines and I find it easyer to lift the box as opposed to dropping the tank. Once the 8 bolts holding on the box and the screws on the fuel filler have been removed 4 guys can lift the box and move it back enough to get at the sending unit.


  3. #3


    Appreciate the reply, the problem is it 's a Suburban.

  4. #4
    stephan's Avatar
    Join Date
    Sep 2010
    Far West, Oregon USA,
    Blog Entries


    There's a thread on here about how to drop the tank & repl the FP in a Burban done by "Backcountryhorsewoman" enter her user name in the search box above & it will take you to her posts.

    ---------- Post added at 04:51 PM ---------- Previous post was at 04:14 PM ----------

    I had some time so I looked up the thread Foxden. I don't remember if she noted that this is easier to do with an empty tank, but fuel weighs 6+ lbs per gallon so schedule the tank drop when you're on empty
    Last edited by stephan; 07-10-2011 at 06:54 PM.
    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

  5. #5


    The job isn't too bad, as long as the tank is empty. Either drive it till it's practically empty, or pump the fuel out before you do the repair.
    Also, about 95% of the time, fuel gage problems are caused by defective tank units, so you're on the right track here.
    Good Luck and God Bless

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