Absolutely. That stuff is some of the biggest nightmare on the planet. It clogs, radiators and clogs heater cores, and something very rarely ever want to use.
Clear corners are illegal per DOT.
The truck is 20 years old, they sell no parts for it, they will not make them anymore.
many people have modified projectors.
This could actually be a belt tensioner..... I would remove the serpentine belt and start the engine for a min to see if the noise is still there. If not, its an accessory, if it is, then its internal.