I have the oddest issue with the blower on my car (2006 Grand Prix 3.8). Does not matter if it is on heat or AC - when the car is at idle nothing comes out of the vents. When I start moving air comes out just fine, hot air if the heater is on, cold air if the AC is on. When I stop again air movement through the vents stops. So far the only thing I have done is replaced the cabin air filter.
When driving is it possible that enough air could be forced through the vents even if the blower was shot?
Thanks!