I have a 1999 Silverado that has a chirping noise coming from under the hood. The chirping only starts once the engine has warmed up and gets faster with engine speed, but doesn't seem to be as fast as the belt is moving.

What I've Done So Far:
1. Replaced drive belt and tensioner
2. Replaced compressor belt and tensioner

Still have the chirping noise and can't tell where it's coming from. I've read post that it could be the water pump bearing going bad and I've also read that it could be the camshaft sync bearing going bad. If anyone could help me, I would really appreciate it, as I hate to pay someone to work on my truck!