Fuel gauge not working correctly

Thanks for the info.

Hello-- I bought this truck a little over a year ago knowing the gas gauge didnt work---the man I bought it from said that a garage mechanic informed him that it needed a sending unit in the gas tank--- not wanting to spend the money at that time he just went by the low gas warning icon--- I recently droped the tank and replaced the sending unit---now its worse---it not only still dont read---but the low gas warning light stays lighted all the time---now I have to go by mileage.--Needle on gas gauge stays below the empty mark all the time. It does move slightly when filling tank. It makes me think that the float arm is stuck in the down position. Thanks ---don m

updated 8-2-09
to jacob and nickolas---on this one the sending unit just bolts on to the filter--- the box removal probly is easier but I work alone and in my driveway--will check out grd. You mentioned---thanks don

Hello--the sending unit on this is held on to the fuel pump with 3 small bolts.--- Will check out grd. As you suggested---years ago there use to be a regulator under the dash which tied in with your fuel gauge.-- (MANY years ago). I need a good wireing schemetic-- don

Thanks for the new info-- will slide box back as that does sound easier---will take unit out of tank and manually operate lift arm and see whats going on---thanks again--don

Hello---i didnt pull box as suggested---(these 76 year old mussels dont work like they use to.) -But I did keep 1/4 tank of gas in it like you said---and it must have been stuck on bottom as I dry tried it and it regestered good.--Put it back together and all is well. Thanks for the good info.-- (Im getting to old for this s---.) Don