Cabin Fan stopped blowing air

My 2002 Alero's cabin fan stopped blowing unless it it on the very high setting. The Heat works, not that I need it right now, but the 4 lower settings are not working. I hear a faint noise but nothing coming through. I'll check the fuse(s) tomorrow, but what are the resistors etc....? Anyone else have this problem?? Its seems a bit strange.

Any advice is appreciated!!

J R

You need a resistor block....follow the harness from the fan connector back to the resistor block.....5.5mm screws hold it in place....