Hi...A lot of air keeps coming out of the middle vent on my 2001 tahoe. It started happening ever since I took it in for a car wash. When the big dryers came on a few seconds into the drying I could all of sudden feel the air rushing into my car, this never happened before. Now when I drive a lot of air comes in like if I have the the air turned on. The faster I drive the more air comes in. Even when the car is in idle its like I have the air on number 1. I know some some air does come in from vents, but not this much. What can cause this? For sure I know that the carwash dryer messed something up.