Chevrolet Malibu Security Light Common Problem

Question:
We went out to start the car last week, upon cranking the engine the security light began to flash. We set the car to the on position to do the relearn procedure for the passlock system as we have had multiple problems with this cars security, it has always worked before. This time it did not, after the 10 minutes had passed we tried to start the car, the security light is now lit solid instead of flashing, the car still cranks but will not start. 2001 Chevy Malibu Security light. No codes.

We did some reading and figure that one of the parts to the security system had gone bad, we had it taken to a local gm dealer for diagnostics, no codes on security came up. The security light is still on, which they cannot explain. However they want to change my fuel pump because there is not fuel pressure, for $700. I would like a second opinion before i pay that much money on something I believe is security related. Thanks for your help.

Answer:
Assuming you have a vehicle that only requires one 10 minute learn procedure (you forgot to mention what kind of car you have) and you've done the re-learn before yourself and it worked, there still could be a problem with the theft deterrent security system on your vehicle.

There is most likely a code stored that didn't get checked correctly at the dealer, but there are also occasions that a problem will occur and not set a code. Seeing many security issues over the years, you probably have a bad ignition cylinder. The cylinder houses the Passlock sensor which learns the chip in your key when you turn the ignition.

A repair like this will have to be done at a GM dealer, as it will need to be programmed correctly after installation. I doubt you have a faulty fuel pump due to this problem, but there are many times a vehicle may have two separate issues that need repair.

Question:
My Chevy Malibu wont start. Why doe the theft/security light stay on. I work at an auto repair shop and this is a customer. Can you help me fix it? Thanks.

Answer:
You should have the computer scanned for codes. But most likely your problem is with the ignition lock cylinder causing the theft/security light. You will need to replace the Theftlock cylinder and then have the system re-learned. Thanks for the tip/donation. I will e-mail a step by step procedure with pics. Since you are going to do this yourself....
step-by-step instructions

Security theft system light comes on Malibu won't start 2 switches Over the years have been replaced to the tune of 500.00 dollars a new starter water pump and Gas pump have all been replaced to the tune of 900.00 dollars this time got the car back and it still won't start?
 Hard to say what it could be since you've had quite a few things replaced. It could be the actual ignition cylinder, not the switch that is bad. The cylinder is what houses the Passlock sensor for your theft system. When there is a problem with it, you won't be able to start the car. It would need to be replaced and the theft deterrent would need to be re-learned to the new cylinder. If you can get the car scanned, check to see if there are any theft system codes. If so, that is your most likely cause.

I have a 2004 Chevy Malibu it won't start. It tries to crank over. I have replaced the fuel pump, ignition coil and just tried to reset the Passover sensor.
 Is the theft or security light on the dash with the key in the ON position?

Yes it's flashing.
 OK. then you have a Passlock Problem. Most likely the sensor- which is part of the ignition key tumbler cylinder.

What do I need to do to bypass this is there a fuse I can pull cause the whole thing of trying to reset is just not working.
 No fuse to pull. There are some instruction on bypassing this system around the internet, i have not tried them. It requires cutting a few wires and soldering a few together on the back of the ignition switch.