One problem related to defogger heater has been reported for the 2003 Chevrolet Cavalier. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2003 Chevrolet Cavalier based on all problems reported for the 2003 Cavalier.
There is a vent for my defroster/heater/air conditioner-on top of the dash--that does not work. I have a friend, that has the same model car. She too has the same problem. It seems like a defect. My windshield keeps icing up and gets foggy.