94 buzzing!

i just did a brake job on my camaro and something strange happened. It has happened before, but i just ignored it. When the car was jacked, I had the key in the ignition so that I could turn the wheels when needed. I went to turn the key and I heard a buzzing noise. I heard the same noise last week when i was just sitting in my car listening to music and talkin on the phone (i was quite bored). I opened the door and it stopped. Last week, when i was in it, i turned the ignition on, but didn't start it, and it stopped. The sound is coming from the knee bolster somewhere. I was thinking it had one of those automatic adjusters for when your are on uneven surfaces, but i was totally flat the first time it happened.

So, buzzing after a while with key in ignition. Buzzing stops when door is opened or i turn on the ignition.

Any ideas?

P.S. (just because i'm too lazy) Does anyone know what size wiper blade refills i need? Is there anyway to tell? I bought the car used, and i haven't replaced the rubber blades yet. Am i stuck with buying the whole blade set?

I dunno about the buzzing, but for the wipers just go to an auto parts store they have a little computer there that you enter your car and year and they tell you what wipers you need, or just ask they person working at the store they will help you I'm sure...

i did that and they said i have to know whether they are thin, wide, or somethin else. They only had a book to refer to which didn't help.

Well, the only ones I can find on Advance Auto parts website are the narrow refills that is all that is listed for our car. So you could go with those, or just get new blades they aren't that much more expensive.

any ideas on buzzing noise?