I think my alternator has packed up on the old cavalier.
I put a volt meter on a the fully charged battery and it said about 12.5v. Started the motor and it went down to about 12.3v. I did the same to my Astra & the girlfriends Astra and they both started at about 12.5v - 12.9v but when started went up to around the 14v area. Does this mean the alternators a gonna. Oh, by the way, the battery is new.