When i fill up my gas tank it only goes to a little less then 3/4 full. The get gas light comes on and i fill the tank and it takes about 16 or 17 gallons of gas to fill. How many gallons are actually in it? How do i fix this problem so the gauge reads correctly?

 

What does your owner's manual state about capacity??
Your gauge is fine, your sender is failing.

 

Owners manual says it has 24 gallon tank. Should i have the sending unit replaced then?