Chances are you need a new fuel level sending unit. This is located on the fuel pump assembly inside the gas tank. Replacement requires removing the gas tank from the car and replacing the whole fuel pump/sending unit assembly as a whole. These are usually available from your local auto parts store, but they are not cheap. Usually around $300
where is the fuel filter located on a 2003 Pontiac sunfire
In the fuel tank
Where is the fuel idle control valve for a 2002 Pontiac Sunfire
If the part number is the same and the configuration is the same then sure.
On average a 1995 Pontiac Sunfire will get about 36 miles per gallon of fuel.
nope.
no
Under the car by the fuel tank
yes
The fuel pump is located in the gas tank
Inside the fuel tank
if you're going through the trouble of dropping the fuel tank, I'd just put a new one in and be done with it