hey my wife has a 2004 impala and for the last 4-5 months sometimes the car will stall and sometimes it'll start right back up and other it won't even crank at all. At first i thought it could be the passlock sensor so I changed it out a few days ago, and it drove fine till today where it stalled at a light. It did start right back up. There were other times it would stall while driving and wouldn't even crank at all so i'm at a loss here. Any ideas??? bcm maybe? I kind of doubt bcm as when it stalls I dont see a security light, but I have seen it when it wouldn't crank.