I have a 1989 GMC Safari with 4.3L engine. My serpentine belt runs
from my tensioner to my alternator, down to power steering pump, up to
water pump, down to crankshaft, up to A/C compressor. Van was making
noise. I noticed that the tensioner is at maximum deflection (straight
down). I removed the belt and inspected that no pulleys were loose.
Belt is in good shape. I have heard the accessory bracket can crack,
but I don't see any cracks. It seems that the most likely part to have
moved is the power steering pump. Could that bracket have bent? Any
thoughts? I'm stumped.