I have a Saturn LS1 2000 which has recently developed a whistling or whining noise which occurs only on deceleration. Specifically within 1/2 second of removing one's foot from the accelerator pedal this sound begins and is audible when traveling in excess of about 25 - 30 miles per hour.
Anybody else experience with this?
May be related to a tech service bulletin 02-t-22 regarding intake manifold.
Any feedback appreciated.