HELLO. My 2006 Gran Prix GT I think has developed a problem with the traction control. With the TC engaged I am hearing/feeling a high pitched sound from the tranny. When the TC is disengaged the sound/vibration disappears. The sound reminds me of a solenoid oscillating. The pitch of the sound varies when the halfshafts rotate. The sound,TC engaged, goes away after you drive a few feet. Reminds me of the clutch chatter on my old Nova SS 12 bolt positrac when the hypoid grease needed to be changed. The car has 27K+ on the odometer. Appreciate any information.
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