1. Check the battery: Ensure the battery has sufficient charge. If the security system or other electronic components do not receive enough power, it can cause the security light to come on. Try jump-starting the vehicle or recharging the battery.
2. Reset the security system: Consult your vehicle's owner's manual to find the proper procedure for resetting the security system. Newer models may have a valet key that can be used to reset the system, while older models may have a specific combination of button presses on the key fob.
If the security light remains on after trying the above steps, it's recommended to take your Tahoe to a qualified mechanic or dealership. They can diagnose the underlying issue and perform the necessary repairs to deactivate the security system and allow you to start the vehicle.
