'05 H2, hasn't done much driving in the past couple years. I'm pretty sure this is some belt issue, maybe even the infamous "chirp" or whatever that is, idk. All I know is this is NOWHERE NEAR normal. Someone help.

 

In the order of likelihood:
Serpentine idler pulley bearing, tensioner bearing, alternator bearing or water pump

 

I guess the old Soap on the belt trick won't work. My BB 502 Vette is squealing also. Did some soap. It helped but came back ...It's like you said...Serpentine idler pulley bearing, tensioner bearing, alternator bearing ..Please Not the the WP..