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Class II OnStar non-amplified GM vehicle
The GMOS-01 interface is designed to allow the user to replace the OEM radio with an after market unit in non amplified GM vehicles and retain full functionality of the Onstar system as well as all safty and warning chimes. The GMOS-01 will also retain the retained accessory power convience features. This interface has the capability of adjusting chime and Onstar volumes as well. In addition to these features, the GMOS-01 now has the required outputs for the installation of a navigation radio.