Chevrolet Repair Questions? Ask a Chevy Mechanic for Answers ASAP
You should then have power to the data link connector for the scan tool. Perhaps your scan tool will not work properly. Try the following procedure:
Important: The vehicle learns the PasslockTM Sensor Data Code and/or password XXXXX the next ignition switch transition from OFF to CRANK. You must turn the ignition OFF before attempting to start the vehicle.
The body control module (BCM) controls functions of the theft deterrent system and controls the security indicator. The most likely problem is a bad BCM. The BCM is located under the dash on the drivers side.