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Download this Metra VT-GMOS-04 Wiring Interface manual for free.
Owner's manuals have a variety of uses but one important use for this connect a car stereo and retain onstar the audible safety warnings and chimes and the bose audio system in select gm vehicles manual is to lookup spare part numbers or find the correct name of a part ;)
Once you find the right name or part number then you can go back and lookup the spare parts that you need!
Got the manual? Now find your spare parts: Metra VT-GMOS-04 Wiring Interface Parts at eBay
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