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I am looking to install an aftermarket HU in my 2006Z. I believe I have Bose (it says Bose on the door speakers, does that mean I have the Bose system?) I don't think I have OnStar and if I do I don't care if I retain it. Can someone confirm what adapter I will need before I make a $100+ mistake?
Appreciate it - continuing to search but I am not clear, I am seeing conflicting information in some threads.