Took the Trail Blazer in twice so far to Carmax where we bought the car. Still haven't fixed the problem. They keep trying to tell us theres nothing they can do more for us besides put chemicals in the vents. Thats no fix. They also can't answer me why my vehicle doesn't drip condensation when the air conditioner is on. I think thats the problem is that it's blocked. They say no they checked. I say no way.