Rick,
That was the same issue I had on my coach. The blower motors are usually the issue. They do not have ball bearing assemblies but have bronze bushings that eventually dry up and bind the armature. As they bind up, they squeak and draw more amperage to operate. As far as access, it is kind of a puzzle but you can figure out how it was assembled. I am not sure on your coach, but my blower motors turn opposite of each other. Hope this helps, Fred