Q: Truck won't start

If this is the factory light on the dash that says "theft" and is blinking fast, then your theft system is activated. You may need to try another key first after locking all of the doors and waiting a half hour before unlocking it. Then trying the ignition again with second key. If it still is active then you may have a theft module that needs to be checked and scanned to see if there is something keeping it active. If you have an aftermarket alarm and cannot deactivate it. Call a mechanic to see what is wrong or have the system removed if necessary. These systems cannot be repaired. If you’d like a second opinion on this, consider YourMechanic, as a certified technician can help diagnose your starting issue and confirm my suspicions.