2003 Buick Regal Help please! Possible Ignition Problem

2003 BUICK REGAL
64,000 MILES • 6 CYL • 2WD • AUTOMATIC
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APMARUNA
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My car started acting up when I turned on the left turnn signal. It would die but only if the car was cold. Than shortly after the lights on the dash would flash on and off continously when key was in ignition. Now the car won't start at all. There is absolutely nothing when you turn the key to start. No noise, no click no nothing. It still flashes though. The flashing will stop when you turn on the headlights. We have checked the starter, battery, battery cables, battey posts, alternator, relays, fuses, fuel system. Everything is fine. I have been told that it is the computer chip in our car keys. That the anti theft system is armed because the chip in both our keys went bad and that the entre car needs to be re-keyed. A very expensive and dealer only job. I think it has something to do with the electronic switch in the ignition. I am not sure what it is called though. Could someone please help me with this problem. I am at my wits end.
Jul 13, 2008 at 5:42 PM
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MERLIN2021
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This is the only thing you can try if it is the security system.
Have you done a relearn on the pass-key?
GM PASS LOCK RELEARN- Ignition to "run" position, try to start and let key return to "run" position
Approx ten minutes security light will go off
Turn key "off" and wait 5 seconds
Repeat 2 more times for a total of 3 relearns.
Turn key off, then start it
Jul 13, 2008 at 6:20 PM
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APMARUNA
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nope it is not that. it is the bcm, body control module or the body computer.
Jul 13, 2008 at 7:52 PM
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MERLIN2021
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That will need to be done bythe dealer, you old one needs to be read, and the new one programmed with the info...
Jul 14, 2008 at 9:27 AM
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MIKIMASTER
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It helps for a while at least. I have the same problem sometimes when turn signal is activated - left or right.
Have you find out?

homegalaxy2@gmail.com
Jan 20, 2009 at 11:05 PM
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MERLIN2021
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If the service engine light is on, scan it for codes, either ther instrument cluster is bad, or if multiple systems are failing, possibly the BCM, But you need a scantool that reads "B" codes to digure it out...
Jan 23, 2009 at 6:39 AM
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