Q: fuel gage on 1998 Chevrolet Cavalier

Rookie cbe0621eac06868b3efe0d8d1d3611e23c60d3114864ea2ec19a68cfbd3eebab
My fuel gage sticks in the full position until a lot of gas is used and then it drops down to about 1/4 tank. I'm not overfilling it.
(1) Answer
Commonly this is a problem with the sending unit in the tank, BUT, have a tech scan the sender just to make sure before you authorize any parts to be replaced.