I have a 2004 GTP and have the d3 recently installed( 2 days ago)
MY car had the monsoon system, so i needed to buy the schoche (wrong spelling) "chime/alert" adapter. so now since then I have a low level "hiss" or static on any input or function with the deck off or on. I have checked all grounds, all good, checked the rca level for proper grounding. all wiring wise is good.
Does with car running or not. I assume it has to do with the adapter.
I am contemplating just swapping the factory amp out unless there is a known issue I have not found.
so to summarize what I have checked:
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