anyone else experience this? im getting a high pitched " whistling" type sound from my a/c vents ( with it on or off ) and its extremely loud and will even drown out the stereo... can anyone help me determine what this is ? is there some part of the HVAC system that breaks or a typical seal that goes somewhere ? thank you


2001 2 door five speed 122k.
custom steering linkage pop
2000 s10 (THE WORKS)