Reply to thread

Message: <blockquote data-quote="Rad10eng" data-source="post: 28229" data-attributes="member: 8989"><p>My son and I actually traced the noise to the rear speakers. Using my spectrum analyzer, the fundamental frequency is around 62 Hz, it is accompanied by a train of odd and even harmonics. This appears to be an issue with the audio DSP. The dealer is supposed to have a fix. They just set up an appointment for me tomorrow. The fix is part software update, part mechanical. The little mic screens next to the grab handles kept falling out in our car, they finally got lost. It appears that GM has newly designed mic screens that come with a template. They need to be adjusted to null out the resonance. Yeah, I am an audio geek! Please take note that the noise is worse between 1800- 2000 RPM</p></blockquote><p></p>