[Ridenour]

Sounds like somekind of malfunction with the passlock security system. Try reseting it by doing this:

Attempt to start the car by turning the key to the Start/Run Position.

Observe that the vehicle fails to start and that the security light is illuminated.

Release key to the 'ON/Accessory' Position. (DO NOT turn key to the 'off' position.)

Allow the vehicle to sit with the key in the 'ON/Accessory' Position for no less than 11 minutes.

Turn key to off position and allow the vehicle to remain in the 'OFF' position for no less than 30 seconds.

Repeat #1 - #5 for 3 cycles.
On 4th attempt, car should start.

NOTE : Since this is a fairly long procedure, limit all electrical sources, such as disconnecting headlights, to prevent discharge of battery.

NOTE 2 : It is SAFE to wait LONGER than the allotted time, but it is not safe to wait less time. I.e. 12 minutes instead of 11 minutes should be safe; however, waiting 10 minutes instead of 11 minutes is not safe.

Properly executed, this procedure should take approximately 35 minutes to complete

Good luck.