fuel sending unit broken wire or gauge is bad
The fuel gauge on a Chevy may become stuck if the sending unit is defective or become disconnected. Without a signal from the tank, the gauge will not move.
Where is it stuck? on full or empty? if on full you got a bad ground, if empty you got a bad float.
If the fuel gauge is stuck, the needle never moves, then the gauge has a problem and needs to be replaced.
just work with it until you get it open. try getting in and kicking from the inside...
your float could be stuck
Float could be stuck in the tank or the ground wire on the tank is broke.
The float that tells your gauge how much gas you have may be stuck or there is a problem with the system that sends that information to the gauge.
Bad connection, blown fuse, or the float in the tank is stuck.
Something is on pulling power from the battery. Can be any light on the car or a stuck relay.
There are several safety mechanisms for the Chevy Corsica. if you accidently left the car out of park when you turned of the car, in some models if your lights are left on it wont let you take out the key.
The fuel gauge could be getting improper signals from the fuel sensor. The sensor is located inside of the fuel tank.
I would replace the thermostat. This sounds like the thermostat is stuck open.