2003 Oldsmobile Alero 2003 olds Alero starter running but n

I have a 2003 Olds Alero that I am working on and when you turn the key you can here the starter running but it doesnt seem to be engaging the flywheel. I removed the starter and had it tested and it tested good. I even tried a new starter just for good measure but it does the same thing. I checked the flywheel and dont see anything out of the ordinary. Im kind of stumped and could use all the help possible thanx in advance