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GMOS-05
From the 32-pin harness:
• Connect the Yellow wire to the radio’s 12 volt battery or memory wire.
• Connect the Black wire to the radio’s ground wire.
• Connect the Blue wire to the antenna turn on wire of the aftermarket radio.
• Connect the Green wire to the radio’s left rear positive speaker output.
• Connect the Green/Black wire to the radio’s left rear negative speaker output.
• Connect the Purple wire to the radio’s right rear positive speaker output.
• Connect the Purple/Black wire to the radio’s right rear negative speaker output.
• Plug the 14-pin harness into the GMOS-05
• The Black/Yellow wire is for the OnStar volume adjustment. This will be discussed in
the OnStar Level Adjustment section of this instruction.
Installing the GMOS-05
• With all connections completed to the aftermarket radio, plug the 32-pin harnesses into
the vehicles wiring harnesses.
• Reconnect the negative battery terminal.
• Cycle the key, by turning the ignition on for 30 seconds. Then off and on again
to test the radio.
Connections to be made
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