I already changed it.
I'm going to keep an eye on it for a while.
I put a posted a reply to the post about dead alternators that when I called the local dealership about an alternator rebuild kit they acted like they had never heard of such a thing.
I'll put a request in at partshop to see if one is available, if so I will probably rebuild the alternator, even though it does seem to be charging, the car has 129000 miles and I don't know if it has ever been serviced. Couldn't hurt.