So today i left my head lights on on my 04 cavalier Ls and my battery died. When i came back to my car i recharged it and my "system theft" light was i knew to get it off and to be able to start the car was to turn the key to the on position and wait for the light to go off and then start it (my 02 Grand Am did the same thing) but now (not like the grand am) my radio says "locked" and my Day Time Running Lights Flash!! And the airbag light stays on!! anyone know what wrong and how to resolve these problems????

Thanks Ed