The shut down problem for 2002 cavaliers address a chipped key re-learn. however my keys are not chipped, any other solution? my cav has all the symptoms of the anit theft shut down

You really need to have the lock cylinder changed, but you will need to have the new lock cylinder re-pinned to the original key for the VATSS system to register the key and allow the vehicle to start.

That is what it does when you don't have the chip.

Start at the ignition switch for losing power in run position. then look at run relay.

If you have the 'chip' key it HAS to have the correct resistance or it will not work. This is programmed into the ECM and will shut the car down if the resistance does not match. If you have an OHM meter, check across your old key at the chip and write down the ohms of resistance. Then do the same with the new key. If they are not the same OHMs the new key won't work unless you have the computer re-learned at a dealer. Most locksmith's and garages can install a temporary fix by installing a resistor of the correct ohms between the wires of the theft system under the dash (two small white wires coming from switch)

when is the last time the fuel filter was replaced?

If the engine will. not crank and the security light is on, the module is not recognizing the chip in the key.
The three possible issues are the sensor in the lock which you say you have replaced, the chip in the key, or the module behind the dash.
You can try a spare key or have a new key made and cross that off the list. That would leave the module in the car.

Sound like a bad ignition key swtch.

It could be a chip computer problem. The new key is cut right, but the chip is not coded into the computer. Must go to dealer to have this procedure done.

hey, i ha d the same problem, turn the key on and let the anti theft light blink till it stops blinking about ten min. then start the car the computer has to re-learn. the pass-key anti theft shuts down the fuel pump and ignition . after i did this i have not had a problem since, i hope this helps

i would say the theft module saw the door trying to be open without the door lock or fob first, once the door lock button was pushed it shut down, it new doors were trying to be unlocked in a theft manner, once shut down it needs time to reset or needs to see ignition cycle with key and read chip in key, smart system isnt it, good luck.