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Applications: The OS-1 is an interface that allows for the replacement of a GM factory radio
that doesn't have RDS, while maintaining the operation of the OnStar navigational
system. The OS-1 has onboard switching and amplification that allows the audio
from the OnStar system to play through the front speakers when OnStar is active,
and mutes the replacement radio.
Left and Right Gain Controls:
The OS-1 adapter has independent left and right controls that adjust the level
of audio coming from the OnStar system.
LED Indicator: This is an
indicator on the OS-1 that lights up when OnStar is active.
Harnesses: The harnesses allow
the OS-1 to be installed in either a Bose or Non-Bose factory system. Refer to
the instructions for specific information on wiring configuration for your
Inputs/Outputs: On the
left side of the adapter, there is an 18-Pin Male Molex plug. On the right side
of the adapter, there is a 16-Pin Male Molex plug, and there is a 7"
harness with a 9-Pin OS-GM21 connector. Refer to the instructions for specific
information on wiring configuration for your particular application.