GM Service Manual Online
For 1990-2009 cars only

Your vehicle has the Passlock® theft-deterrent system.

Passlock® is a passive theft-deterrent system. Passlock® enables fuel if the ignition lock cylinder is turned with a valid key. If a correct key is not used or the ignition lock cylinder is tampered with, the fuel system is disabled and the vehicle will not start.

During normal operation, the THEFT SYSTEM light will turn off approximately five seconds after the ignition key is turned to ON and the engine is started.

After attempting to start the engine, if the THEFT SYSTEM light flashes or stays on, wait ten minutes with the key in ON until the light goes off. Then turn the ignition to OFF before attempting to start the engine again.