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Connections to be made
From the 30-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 18-pin harness into the GMOS-LAN-03.
• The Black/Yellow wire is for the OnStar volume adjustment. This will be discussed in
the OnStar Level Adjustment section of this instruction.
The 12 pin harness (ASWC plug) will be discussed later in the manual.
Installing the GMOS-LAN-03
• With all connections completed to the aftermarket radio, plug the 30-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.
GMOS-LAN-03
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