Installing the GMOS-LAN-10
With the key in the off position:
• Connect the 16-pin harness with stripped leads, and the GMOS-LAN-10
harness, into the interface.
• Connect the GMOS-LAN-10 harness to the wiring harness in the vehicle.
Note: If using the ASWC-1, connect it after you initialize and test the GMOS-
LAN-10, with the key in the off position.
Initializing the GMOS-LAN-10
Attention! If the interface loses power for any reason, the following steps will need
to be performed again. Also, if installing an ASWC-1 connect it after you initialize
and test the interface/radio, with the key in the off position.
• Turn the key (or push-to-start button) to the ignition position and wait until the
radio comes on.
Note: If the radio does not come on within 60 seconds, turn the key to the
off position, disconnect the interface, check all connections, reconnect the
interface, and then try again.
• Turn the key to the off position, and then to the accessory position. Test all
functions of the installation for proper operation, before reassembling the dash.
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GMOS-LAN-10
Adjusting the GMOS-LAN-10
OnStar level adjustment:
• Press the OnStar button to activate it.
• While OnStar is speaking, press the VOLUME UP or VOLUME DOWN buttons on
the steering wheel to raise or lower the OnStar level.
• If the vehicle does not come equipped with steering wheel controls, locate the
Black/Yellow wire on the GMOS-LAN-10 harness.
• While OnStar is speaking, tap the Black/Yellow wire to ground. Once the
OnStar level is set, it will stay at that level until the Black/Yellow wire is tapped
to ground again.
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