Gill u have 2 blowers for the dash. There is 4 ducts coming off of each one. 1 is easier to get it its the one on the right side. The one on the drivers side is quite buried. CC along with many other conversions did not build in any amount of accessability. I really hope the passenger side is the one making noise. If not the best way to pull the drivers side blower motor on a motorhome conversion is out the front. Drill out the rivets on the sides and bottom of the center front stainless and lift it up. The blower will be looking at u. This is the alternative to pulling the flooring and the step slide and CC also has the bottom of the dash to deal with. This method takes a 4 day job and turns it into 4 hrs. Ive done a few. Sounds crazy but it really is the best method.