I have a 2000 Buick Regal 3.8 My car will not start or turn over at all.
when I turn the ignition on the instrument lights on the dash just rapidly flash. I have only had the car a couple months. It started when I was going 70 on the highway about a month ago. It just shut off and the dash lights where flashing, luckily it started back up before I could get pulled over and stopped. Almost crashed. After that it shut off a couple times but I would leave it alone a while and it would start again and be fine for a while. Now this time I stopped at the store came back out and this time will not start at all. I had to get it towed home. It has been since yesterday and have tried everything and will not start. The lights on the dash flash. I have tried cleaning and checking battery connection, The starter has no power, I tried to do 30 min key reset. Not sure what to do next and I am hoping someone on here has some good idea'*. Thanks for any help.

How old is the battery?

If you have a voltmeter, put it across the battery....should read 12.6 volts on a fully charged battery....

Now what is the reading with the key in the crank position? Must be at least above 10 volts for the car to start.....

You checked the battery connections? Clean and tight? NO corrosion?

Has the BAT light ever come on while driving? Do you have a voltage Gauge in the cluster? Does it always show it is charging?

Also check the connections at the starter and chassis ground?

If the battery is more than 3-4 years old, like Mike is suggesting, it could be on it'* way out.....

If the battery is ok, sounds like an intermittent connection somewhere...

I would also suggest a battery test and alternator test. Alternator will be tough at the moment since the car is deadlined. But you can remove the battery, and (in addition to the voltage test described above) take it to anyplace that sells batteries and they will load-test it for you. Sounds like it might be toast. Low voltage can cause all kinds of electrical problems for cars while driving, and is the first thing you should check out.

Thanks guys I am checking it out and will let you know. Thanks for info and quick response.

Ok so a friend of a friend told me to disconnect the battery and wait 10 hours and try to start the car, so I did the battery check and was waiting for the 10 hour mark, when 10 hours was up I started the car and it worked. Yah. But I still don't know what is causing all this and I am sure it will happen again. SOOO I still need to figure out WHY this is happening... Any Clue anyone ?
The guy that said to wait 10 hours said it could be something to do with the security. But how do you fix it ?

Ok so came in to post a message to you then went back out and the car will not start and is doing the same thing. Happy then Sad in less then 10 minutes.. Darn it

When the car won't crank over, release the key...is the SECURITY staying on?

No I cant tell if the security light stays on they all just flash. The battery has 12.0 without key on and with key in on it is 11. just to answer the question about the battery. The BCM makes a clicking noise and the wire making the noise goes to the ignition. I unplug that one and plug it back in and sometimes after doing that it will start.

You never did tell us how old the battery is.