03 cranks but no start

Hello, sounds like with a flashing green key that there is an relationship issue with the key you are using and the vehicle. Programming must be performed to ensure the key can be used. You may say it was driving fine, but something happened here - likely a different key than usual is being used. Seek guidance from a shop that can program keys and investigate system integrity. Use this link to find some shops near you that can help with your concern: www.repairpal.com/repair-shops