buzzing

Ok I have a 96 Tahoe 5.7 with 113k miles. Last week it started doing this weird thing where I'll turn the key and all I hear is a load buzz. Engine doesn't even attempt to turn over. If I just keep the key in the on position and try starting it a few times it just keeps buzzing, but if I turn...

I have a problem with the built in sunroof wind deflector making a buzzing sound. It's only when the roof is closed and at 35mph and up. I tried putting a little grease in slots on the sides where the aluminum deflector is pushed down, but that only worked for a day or two. Any suggestions...