Problem with my 2002 Olds Alero
2.2 Four cylinder
dash lights =
security light
work done to repair = replaced ignition module
tip/donation yes
tech = JK
question = The car was working fine and the radio was left on while I
was in the car.  When I went to start it, it wouldn't start.  After
letting it sit for awhile it finally started. We had it tested for codes
and non came up.  We replaced the ignition module and it started right
up.  Now it won't start again.  I have read about this problem from other
people on here and it seems as though it may be the ignition cylinder
is bad.  I saw where you told a person you would send them some
information on how to replace this.  Is that something you could also send to
me?  I would really appreciate it and an email would be the best way so
I could have it quickly.






JK:
Thanks for the tip/donation.

It does sound like the ignition lock cylinder, which is also called the Passlock Sensor.
  
Here is a pic of the release tab on the ignition switch. Remove the radio to access
this.  
Oldsmobile Alero ignition switch and passlock key cylinder removal and installation.
--------------------------
Alero Theft / Ignition Passlock Cylinder Replacement
Procedure And Re-learn.
Theft / Security Light
-----------------------------
The security system on todays cars and trucks prevents the vehicle from  being stolen. There are many
variations of the system going back to the  early 1990's.
This warning could be on when the engine is running, indicating a fault has  been detected in the system. If
left unrepaired, there is a good possiblity that  the car will eventually not start.
There are several different possibilities for the cause of the warning,  depending on the make / model / year of
the vehicle. Anything from a bad  ignition cylinder wire, to a bad cylinder to a dad Body Control Module (BCM) .
After market (non-factory) alarm and remote start systems can cause havoc  with the factory theft system,
causing this warning light, or a no start.
GM Dealer Technicians