Can you confirm that the cause of the noise problem in 2002 LeSabre is
the heater hose bracket shared with the alternator. I have a similar
problem except that the noise is intermittent - stops when brakes are
applied - or when I activate the recirculate button on the AC. I can
pinpoint the noise as "in the vicinity" of the alternator. Only occurs
after highway travel exceeding 50-70 miles. So far two Buick dealers
are clueless. The alternator and serpentine belt have been replaced
with no effect.