Started about 2 days ago and was off and on but now it's constant. I pulled the filter and also put my hand on the motor and it seems to be vibrating "lower rumble Noise" When I turn off the air, it goes away. Anyone have this problem? I wonder how long it would take for something so simple like this to change out..

 

https://www.chevyhhr.net/forums/show....php?t=18419#9

 

Dealer should be able to change it out pretty quick. Both times I had my 06 in it was fixed same day (actually within a few hrs)