My 2002 Seville SLS has had a history of stalling when stopped, driving as well as not starting, although the battery is ok. Over the past few years Legends Cadillac in Scottsdale, AZ has replaced crank sensors, ignition switch and the problem goes away for a period of time. Each time they check for codes there are none. I really like the car and only have 70K miles on it and it still under GMPP warranty. I'm at my wits end and don't know what else to do. Your help is most appreciated.