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Discussion Starter · #2 ·
You do have to buy additional parts.

Check out www.crutchfield.com and see put in your vehicle. it will give you a list of items you'll need when you select a head unit.

You'll need to buy this from them or something similar.
http://www.crutchfield.com/S-e1ymgHtlgtt/cgi-bin/prodview.asp?i=120GMOS01
 
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