My fuel sensor may be having problems,the needle bounces and it does not always read the amount of fuel.The tank is off and I am not sure how to replace and check the sensor. It is a 1975 chevy silverado K10 pick up Thank you Mark Bigler

Just bend the wire on float till it reads as the amount of fuel u have in tank very easy to do just be care full with fuel

i would make sure that all the connections at the fuel tank pressure sensor are good also check for bent lines that may be restricting fuel , even the return line and vapor return line.
these trucks do have a lot of wiring problems for the fuel tank pump. check the ground for the pump, it goes to frame. if you need to add another ground wire and splice it in.

If the truck was running good before the tank drop then double check everything . also you may have a bad sensor. with your scan tool you could , if the scan tool can. test sensor by add air to tank,make sure to clip the vent line and check readings when adding air to tank and then release the air and watch the readings if they do not go up and down then replace the sensor.

check the ground wire for your fuel gauge, or it would be a bad fuel level sensor which is located on the pump assembly itself, located IN the fuel tank.

sas

Your problem, as to my knowledge, seems to be more of a ground issue, or power supply issue. Check the grounds throughout your vehicle, including the ground for the fuel pump.

Might be a sensor that tells the amount of gas in the tank!
Ask dealer or Google it!!
This is what I Googled (95 z28 fuel gauge problems)
Go read that an see if you have the same problems they all do

Good luck!!!
Pat

this is caused by only one thing, and that is the gas gauge sending unit inside the gas tank, replace it.

the fuel level sensor inside your gas tank might be defective
you need to drop the tank and check the level sensor

Check online in other forums of this particular issue. Others may have had the same issue and have found answers through other sites online. Sound like a bad sending unit "fuel gauge sensor". Unfortunatly, it may be a requirement to remove the fuel tank to gain access to this fuel sensor. If you dont have the means to repair this problem you can always keep track by the mileage that you put on your vehicles tripometer. I know thats a pain but it wont cost you any money until you choose to have the repair done.Estimate your mpg's and the size of your fuel tank by the gallons, and multiply the two. Be sure to keep track and have enough fuel not to run out! Its always better to keep half a tank than an eighth of a tank!

Speedometer or fuel gage?

If speedometer which is bouncing around, it is likely a bad ground near where the speed sensor wire harness (which connects the speed sensor to the rest of the "network") exits the transmission housing. It's at the very back of the transmission (you have a 4T60E trans) to the left of where the right side half-shaft leaves the trans housing. Just look for damaged wires. If none, replace the speed sensor for $50-60.

If it is the fuel gage, the sensor is probably not "zeroed"--it's reading wrong, too high, and if it were to start at true "empty", it would read right. Thus, the gage is always reading a little high (maybe a 1/8-1/10th of a tank too high?). This isn't a problem until to stop, start, or turn quickly and cause the fule to slosh around in the tank and starve the in-tank pickup which sends fuel to the engine.

If it is the fuel gage, you should simply put as much fuel in as you can and see if the needle goes far above "F". If it does, note how far it went and then practice filling the tank when the needle is that same distance above "E".

Hope this helps.