When I remove the keys & the car is no longer running sometimes the car will still blow air through the vents, not continuously but off & on.
Why does air still blow through my vents when the car is turned off? on 2006 Pontiac G6
GM has added relays to the blower motors of some models to prevent a mildew smell. The fan will blow for 3-5 minutes to dry the evaporator core when you shut the car off. It is normal.
I can go out to the car & get something a hour or two later & it is still sometimes blowing.