O.k my gas indicator is sticking when ever i turn on the car it says that i have less gas then I have, and I remember when I had my chevy cavalier that when it did that same thing there was a coolant problem. My Cobalts never had one because when I did it to my cavalier thats when I had leaks and more problems.
The Cobalts at 163 000 kms for you Amercians thats over 100 thousand miles now.

Should I be worried about this?