I have a 96 pontiac firebird. My car will start and run great for about 10 min. then it will just randomly shut it self completely off. It does have an anti-theft lock system that could be shutting it off and we're considering taking it to a the dealer to see if thats the case. But I wanted other opinions to see what else it could possibly be. I'm trying to avoid taking somewhere and spending a bunch of money if possible. Any suggestions?