Hi,
First thing to do is turning the ignition on and wait till the light go off
than drive to a garage to inspect the ignition switch (faulty anti theft)
SOURCE: Flashing Theft Sytem
i have a 1997 pontiac grand am and it did the same thing when you go to start car and it won't start after 3 trys you have to turn the key to the on postion and let it set for 11 min no more then 11 min then turn it off and count to 30 then it should start. there is no way to go around this wiring .i have asked everybody also if you disconect the battery for a while and hook it back up that might reset the computer and that will work that is what fixed mine for now its been 6 months and hasn't done i sense
SOURCE: car starts run's 3 seconds shuts down
Your car is equipped with a system called PASSKEY standard on all GM cars and light trucks, try the following procedure to reset the system, the battery being dead will trigger the system.
PASSKEY LOCKOUT RESET GM CARS 1999 UP
1) Put the key in the ignition and turn to the "ON" position. Leave it that way for 10 minutes. After 10 minutes turn the key and take it out. Repeat this process (2) more times (3 times, 30 minutes total) This should reset the passlock system to recognize your key.
SOURCE: 1999 Pontiac Sunfire ignition lock cylinder
try turning the ignition on try to start then without shutting key off wait 10 mins then shut key off then back on but do not try starting leave on for ten mins then back off turn key back on to run but do not try starting it wait ten mins then if it reset it should crank over and start if not repeat all steps again
SOURCE: sunfire will not start, it started for a second or
What you are describing is a security theft alarm problem. If you checked out what was mentioned above and the car still starts and shuts down again you can first double check by looking for a flashing theft light after you tried to start. If it is flashing put on the emergency brake and shut off key and then try to start again. If it fires up and stops just leave the key on in run position and go have a coffee. Come back in about 15 minutes and if the theft light isn't flashing any more just shut off key and start normally. The car will now start. Over the past 5 years I have rebooted the computer on at least 100 of these cars and this is the fix procedure.
The problem usually starts by removing a electical item such as a gauge cluster etc without first disconnecting the battery. Do not work on these cars where anything gets unplugged with the battery hooked up.
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