About the Metra GMOS-01 Wiring Interface
Metra's GMOS-01 interface lets you replace the factory radio in select OnStar-equipped 2000-up GM vehicles using the existing wiring and connectors. Even if you don't subscribe to OnStar, you'll need this interface to connect an aftermarket stereo.
Hook the GMOS-01 to your aftermarket radio, mount the module, and plug it into the existing factory plug. Get the great sound you want, and keep all important safety features intact. And you can adjust volume settings for OnStar as well as the safety chimes. Also, once you turn off the ignition in these GM vehicles, the radio continues to play until you open the door. This interface maintains that function with your new aftermarket radio.
This interface is compatible with select 2000-up GM vehicles. If you haven't done so already, please enter your vehicle information or call an Advisor at 1-888-955-6000 to find out if this item is compatible with your vehicle. Warranty: 1 year.
Note: The GMOS-01 will not work with factory-installed Bose car audio systems.
What's in the box:
- GMOS-01 Class II Data Bus interface
- Wiring harness with 10-pin Molex on one end and bare wires on the other
- Wiring Harness with 12-pin Molex on one end and 24-pin Molex and 12-pin Molex on the other (plus bare wires)
- Installation instructions
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More details on the Metra GMOS-01 Wiring Interface
Overview: The GMOS-01 lets you install an aftermarket receiver in select late model GM vehicles without losing the OnStar Emergency Services features or the chime that warns the door is open. Please check the Crutchfield Vehicle Selector to confirm compatibility with your vehicle.
Note: This adapter is not compatible with factory Bose or Monsoon systems.
Connections: The module includes a 10-pin harness (5 pins used) that connects to the switched power and front speaker leads of the new radio. A second harness (12-pin, 10 used) connects the module to the factory OnStar and radio plugs, plus the rest of the wiring for the new radio.
OEM Steering Wheel Control Compatible (optional): The GMOS-01 features a right-angle 3.5mm connector that lets you keep your GM vehicle's OEM steering wheel controls via the optional Axxess Steering Wheel Control Interface (120ASWC1, sold separately).
Volume: The volume is adjustable for both the OnStar output and the warning chime.
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