Does anyone have an idea about how to address a high pitch squeal (not too loud) that seems to be pulley noise while the engine is running? I only hear it when the vehicle is in the garage, but my wife hears it all the time. ( I guess that she has better hearing than I do!)

Thanks!

 

Worn belt?

 

stp belt dressing

 

I think you have a blower under the hood

 

Maybe use a penetrating oil on the nut.

 

worn belt my guess. i replace mine (both) once a year. time to swap out the stock tensioner(spell?) though.