Why does my stereo system in my '06 Grand Prix rattle and vibrate even when the stereo and car are turned off?
The noise goes on and off when I hit a bump. It sounds like a CD spinning unevenly in the
deck, but it comes from the read of the auto. The Monsoon system sounds great, but
when it is off or the volume is low, I hear the noise. There are two speakers and an
amplifier back there. I don't know which the noise is coming from.
Are you sure you haven,t blowed a speaker?
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