I recently had my cobalt in a accident where my radiator was bashed in by a cone, after having it inspected by the dealership they saw that it didnt overheat( no engine light or coolant light came on and i drive it several miles after the incident because i didnt know the damage was that bad)

So 2 weeks later i have the coolant flushed/filled, the dealership filled the expansion tank up to the tiptop of the tank, Now im starting to notice that the coolant is getting lower than the when i recieved from the dealership. I also notice that the coolant(in the expansion tank) when it is cold is lower than when the engine is heated, it eventually rises but not to the level when i recieved it from the dealership.

Do I have a problem?

 

probly not, it may have just been air in the system. never drained one so i don't know how hard it is to get all the air out. best bet, park the car in a clean place, or put cardboard or something under it and let it run for like 15-20 mins and look to see if anything is hitting the ground.

or you could take it somewhere and they could pressure test the system.