My husband and I have a 99 Bonneville SE and with 101K miles on it. Last night, it was acting bizarre. The computer acted like it was reset because the doors automatically locked when the car was put into gear (It does this when the battery is taken out or changed...but we haven't changed it in a couple years) but it drove fine. Tonight when trying to start the car all the lights flickered on and off...and the car wouldn't turn over. My husband waited and tried again...same thing. Then finally it flickered, struggled a bit and started. It seems to have power fine when it drives, but when you start it cold or let it sit for a while it does the same thing. The lights flicker and then it won't start. Any ideas? It doesn't seem to be the Vats issue as the security light isn't acting funny. Thank you!