@graveling has a point, before you get too deep, just recheck your wires and grounds. Over the last few years on here I've seen people with buzzing noise on the 98-99 and I've seen people have zero noise.
Also, the infamous buzz that everyone gets is actually pretty quiet. So if you have a very loud buzz, sounds like there is a ground issue.
Also, the infamous buzz that everyone gets is actually pretty quiet. So if you have a very loud buzz, sounds like there is a ground issue.