Hey I was driving home last night when all of a sudden all of my dash lights turned on like I was starting my car up and my temp, and rmp gauges dropped to 0. Then they turned off and went back to normal. Then they started doing it again over and over and over. Kinda annoying lol also I noticed I can hear a buzz comming from inside the dash board when my key is in the on or acc position but only when my headlights are off or on the second notch. When I turn them on it stops. I drive a 1998 cavalier with a 99ld9 in it. Anyone have any tips on where to start looking? My air bag light came on about 2000k before this too. No other errors other than that normally before this problem

I had the same problem with my 98. There is a ground under the battery.... bolts on to the battery tray if i remember correctly, check that first. Good chance its just corroded. I cleaned mine up and reattached it and it solved my problem.