i didn't know i had a car alarm, but the sensor on the dashboard is blinking. How do i disarm or turn off the alarm
You can't it is part of the programming in the BCM. It's active when you lock a doors and deactivates when you unlock the drivers door. More information can be found in the owners manual, take some time and read the manual, there is a lot of information in there you might find useful.
Search Chevrolet Sonic Questions
Chevrolet Sonic Experts