I'm in need of a new car I currently have a system and have seen the stress it puts on a stock alternator. I'm very close to getting a good deal on this 2007 grand prix and I'm undecided on whether or not I am going to put any kind of speakers in it. However I can not find a high output alternator for a grand prix newer than 2004 am I looking in the wrong spots or do they not exists. Any help is welcome ...thanks.