I have a 2006 Chevy Cobalt… I can smell gasoline ONLY when I turn the heater or a/c on. I have taken the car to TWO different auto shops and no one knows WHAT is causing this. The check engine light came on recently after a radiator flush and the first auto shop said it was a thermostat switch and bring it back the next day. I was leery of this and went to the second auto shop who told me they never heard of a thermostat switch and to bring it back whenever the check engine light comes on again. Meantime, I will not turn on the heat or air because the gas smell gives me a headache.
Does anyone know what this could be?