2oo4 Grand Am ( window issues)

While rolling up the driver side window I noticed
how sluggish it was moving that's when I heard the
sound of something break and fall inside of the
cars door.  Immediately the window stopped
working. I was able to manually push the window
up ( almost to a closed position) as a quick fix.  My
question is " where can I get my window's
problems diagnosed and  repaired and how much
should I expect to spend?"