Starting problem with my 1998 Chevrolet Malibu.
Security theft light.
Repair work done= just try to start and it wont. Theft flashing.
tip/donation yes
GM tech = jk
question = Why does my chevy not start. My malibu will crank over but not start   
sometimes. The theft security light will come the dash and flash sometimes. I  
have seen on other sites that there is a re-learn code procedure to get it to start.
How do i repair this problem. Are there any parts involved, or just a code relearn.
Chevy Malibu passlock re-learn procedure.
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. Systems have been called Theftlock, passlock, PK3.
This warning could be on when the engine is running, indicating a fault has  been detected in the system. If
left un repaired, there is a good possibility 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.
Answer: A faulty ignition lock cylinder is the most common cause for security /
theft light. This procedure is  a relearn that should get it to start until the part
is replaced.

Turn ON the ignition, with the engine OFF.

Attempt to start the engine, then release the key to ON, vehicle will not start.

Observe the SECURITY telltale, after approximately 10 minutes the telltale
will turn OFF.

Turn OFF the ignition, and wait 5 seconds.

The vehicle is now ready to relearn the Passlock Sensor Data Code and/or
passwords on the next ignition switch transition from OFF to CRANK.

Start the engine, the vehicle has now learned the Passlock Sensor Data
Code and/or password.

Best to have a battery charger on during this time to avoid a weak battery.
A very weak  battery can cause programming failure.
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10-19-10
1997 CHEVY MALIBU- CAR WANT CRANK BUT THE GAUGES GO CRAZY.
Comments
Could be several different things to cause this problem.
Most likely a bad battery or corroded cables, or a bad
ignition switch.
2-23-11
today i came from work got home now my car crank over but it wont start and theft light is blinking