Hi All, first time posting here and looking for some guidance. My 2012 Tahoe LTZ cabin HVAC blower motor is "chirping" when it runs. Clearly the motor bearings are failing and the blower needs replacing. I ordered a replacement from 1Aauto.com and when I removed the blower shroud from my vehicle (it is in the footwell of the front passenger seat) it looked slightly different. 1Aauto was great about processing a refund, stating that my blower has a "detachable vent tube" and the ordered part has an integrated vent tube. These parts are not interchangeable. Does anyone have any intel on this difference or how I might go about replacing the motor myself? Happy to provide pictures if that would clarify. Thanks in advance.