The GM9-MFF is a 9-Pin Y-Harness that allows the installation of a GM Factory Cassette, CD, or CD Changer to the OEM head unit of a GM vehicle equipped with OnStar. The adapter also allows one to add an auxiliary input adapter such as the GM9-AUX. Plug & play design means no cutting of wires of splicing. OnStar remains connected and on standby until you need it!
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