I have a 2003 Grand am. my dashboard lights, my blower for heat and an air conditioning, the radio, the electric windows were all going off and on. once the car was running for a few minutes they would come back on. Until the next time I shut it off and started it again. But it got to a point where they wouldn't come on at all. I replaced the ignition cylinder. Now I have nothing for electrical across the dashboard and everything not even the check engine light. I checked the fuses. What else could it be?