This depends on several factors:
Bypass the pass key3
The theft deterrent system is built into the Body Control Module. There are sensors and switches that affect the BCM throughout your car so you need to be more specific as to what you're looking for.
you have a problem with theft system possible key cylinder
Car will not start because I think that anti theft is the only have a key no remote
Theft alarm/ chipped key system malfunction.Theft alarm/ chipped key system malfunction.
A malfunction of the Sentry Key system (key with a theft chip in it)A malfunction of the Sentry Key system (key with a theft chip in it)
Brake system-comes on briefly when activated or stays on if trouble like low fluid (or other) in system
disconnect battery for 30 minutes,and then reconnect to reset
disconnect battery for 30 minutes,and then reconnect to reset
.You can reset the antitheft system, on your 2003 Chevrolet Cavalier, by removing the fuse. Keep the fuse out for 10 seconds. Replace the fuse to its original slot
It seems you have no other choice than the stealership. See Theft-Deterrent Feature on page 3-86 of your "Owner's Manual". Something to do with the car VIN number.....
The low pressure switch could be activated because the system is low on freon.