It could be, try shooting it with some wd40 and if it changes pitch or stops it probably is.
I was looking for an answer to this question myself, and found it answered at: talkaboutautos.com
Do you have diagram of 96 olds 98 putting a belt on an alternator.
Once you have proved that the battery is in good condition, you should then check the starter solonoid to determine if it is working. It triggers the bendix spring in the starter shaft gear so that it in turn engages the flywheel and makes the engine turn over. You should hear a positive click ( you will need someone to engage the ignition key while you are listening under the hood). If the starter fails to engage even though you are certain the solonoid and Bendix spring are working, or if the starter engages but is "dragging", you could have a defective starter. More than likely, this is the case, and it is best to have it removed and replaced with a new or rebuilt starter from your parts resource. Again, before you give up, make sure your battery is not the culprit.
First you have to purchase a new one for about $250 or switch to a non-power antenna. Then with the car off so the antenna is in the down position, locate the antenna motor by pulling the side wall of the inside of the trunk (the side with the antenna) loose (be sure to unhook the plastic fasteners). Once you can see the antenna motor you should be able to see the wires that deliver power to it. They come together at a male/female connector just before the exterior of the antenna motor. Disconnect them. They should pull apart fairly simply. Once you have done this find the large black wire the runs to the radio. It connects towards the top if the attenna shaft inside the car. There is what looks like a small sleeve on the wire close to the attena shaft, it pulls apart there. Then you will need to disconnect the ground wire. It is connected to the frame of the car with a Phillips screw. Once that is remove, locate the bolt about 4" below the ground screw (should be 10 mm socket). This bolt anchors the antenna to the car. After this bolt is removed you should be able to slide the antanna out of place. At this point you will notice a black tube coming out of the bottom of the antenna motor. Just pull it off. It should slide off easy. That is it, the antenna is out. If you are replacing it with a new one just reverse the steps to install it. If you are putting in a non-power one. Install as directed on package. The only wire you should have to use is the one coming from the radio and it should plug right into your new antenna.
Hope it helps.