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Wrenchtech, ASE Certified Technician
Category: Chevy
Satisfied Customers: 1403
Experience:  40 years experience with ASE certification as Master Technician with L1--Repair Shop Owner
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Chevy lumina: the security light is flashing on the dash and the car

Customer Question

i have a chevy lumina and the security light is flashing on the dash and the car will not start everything will come on but the car will not turn over can you help
Submitted: 9 years ago.
Category: Chevy
Expert:  Wrenchtech replied 9 years ago.
Is this a car or an APV?

What year is it?
Expert:  Wrenchtech replied 9 years ago.
I'm giving you the Passlock relearn procedure. This may or may not work for you. If it does not work, that means that you have a hard failure in one of the security components and will require the use of a Tech 2 scan tool to diagnose it.


IMPORTANT: Due to component variability, the vehicle theft deterrent (VTD) system must have the learn procedure performed regardless, if the vehicle starts on the first ignition cycle after a VTD repair.

You must perform a theft relearn procedure if any of the following components have been replaced:

  • Passlock Sensor
  • Instrument Panel Cluster (IPC)
  • Powertrain control module (PCM) The above modules, with the exception for the Passlock Sensor must also be programmed with each module's own vehicle configuration.

Time required, approximately 10 minutes:

  1. Insure that the battery is fully charged.
  2. Use the scan tool in order to clear the DTCs.
  3. Turn the ignition switch from the OFF position to the CRANK position attempting to start the vehicle. The vehicle will start and then stall.
  4. Leave the ignition switch in the ON position while observing the security indicator.
  5. When the security indicator turns off, which can take up to 10 minutes, turn the ignition switch off. Wait 10 seconds.
  6. The BCM and the PCM will learn the new code on the next start attempt.