GSS25WGPDWW Howling fan in Freezer

I’ve seen the posts about the howling noise in some GE side-by-side freezers. I just ordered the ASM board and replaced it but the howling, while slightly less pronounced, is still occurring. Could it be the motor to this fan that is directly under the ice tray causing the problem? If so, is this an easy replacement or does it require removal of a lot of parts to get to it? model GSS25WGPDWW and is a GE thanks, Michael