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Message: <blockquote data-quote="SicAudio" data-source="post: 5938568" data-attributes="member: 609136">try using a dif temporary direct to battery power source for the HU and see if it goes away.  I bet it will.  the constant power on the new GM's is poopoo.  Ill bet you will need to run a fused constant off the main underhood FB.also try a dif ground spot first.  if your amps chassis is grounded  change it.  that will create a ground loop as well.  mounting the chassis where it can ground is a big nono.  the only ground you want the amp to see is the big ground terminal  never the chassis.  and dont ground the deck to the same spot as the amp.  multiple short grounds are better than lumping all of them in 1 spot.</blockquote>

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