2002 Buick Regal Security Light On
Try performing a relearn first to see if it takes- See the guide below
https://www.2carpros.com/articles/how-to-reset-a-security-system
Suggested Repair
Have a dealer test the vehicle security/VATS system, since they have the proper equipment. As a temporary way to start, turn the key to run for more than 10 minutes, then try to start. Also confirm the key has a transponder pellet and consider a security relearn if contact or wiring at the key cylinder is suspect.
Conversation Summary
The owner of a 2002 Buick Regal reported the security light staying on after starting. Replies suggested a key-chip contact problem, possible wiring between the key tumbler and anti-theft module, and a security relearn. An expert asked whether the key has a separate pellet and later advised that only a dealer can properly test the system. To get the car started, leave the key in the run position for more than 10 minutes, then try to start.
