From the 16-pin harness with stripped leads to the aftermarket radio:
• Connect the Red wire to the accessory wire.
Note: If installing an ASWC-1 (sold separately), there will be an accessory wire there to
connect as well.
• If the aftermarket radio has an illumination wire, connect the Orange/White wire to it.
Note: If the Orange wire on the GMOS-01 harness is populated on the factory side, use that
wire instead.
• If the aftermarket radio has a mute wire, connect the Brown wire to it. If the mute wire is
not connected, the radio will turn off when OnStar is activated.
• Connect the Gray wire to the right front positive speaker output.
• Connect the Gray/Black wire to the right front negative speaker output.
• Connect the White wire to the left front positive speaker output.
• Connect the White/Black wire to the left front negative speaker output.
The following (3) wires are only for multimedia/navigation radios that require these wires.
• Connect the Blue/Pink wire to the VSS/speed sense wire.
• Connect the Green/Purple wire to the reverse wire.
• Connect the Light Green wire to the parking brake wire.
CONNECTIONS TO BE MADE
From the GMOS-01 harness to the aftermarket radio:
• Connect the Black wire to the ground wire.
• Connect the Yellow wire to the battery wire.
• Connect the Blue/White wire to the power antenna wire.
• If the aftermarket radio has an illumination wire, and this wire is populated on the factory
• Connect the Green wire to the left rear positive speaker output.
• Connect the Green/Black wire to the left rear negative speaker output.
• Connect the Purple wire to the right rear positive speaker output.
• Connect the Purple/Black wire to the right rear negative speaker output.
• The Black/Yellow wire is used for OnStar level adjustment for models that do not come equipped
• Tape off and disregard the following (1) wire, it will not be used in this application:
side, connect the Orange wire to it.
with steering wheel controls. See the OnStar level Adjustment section for further instructions .
Orange/White.
Continued on the next page
3
REV. 1/15/2018 INSTGMOS-01