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Message: <blockquote data-quote="traystew" data-source="post: 6509713" data-attributes="member: 617147"><p>I just bought a Pioneer AVIC-U310BT from Best Buy and had it installed.  After picking it up any time I get up to highway speed, I get a high pitched noise out of my dash.  They have had it back three times, changing out the GM module and this last time they reinstalled my old head unit in the trunk and ran the new unit through it somehow.  Went to pick it up and the sound has still not going away.  It starts out at a high pitched Morse code at around 65MPH and is constant high pitched whine at 75 and above.  It is highly annoying and I need help.  Thanks!</p></blockquote><p></p>

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