Where is the gas float on a car and how do you replace it?

the gas float is usually attached to the sending unit inside the gas tank. most cases you need to drop the tank and take the sending unit out the top. however on some cars it can be removed from inside the trunk or under the back seat. a metal ring retains the unit. unplug the wires and hoses then turn the ring counter clock with a hammer and screwdriver. install is the reverse