Metra GMOS-09 Factory Integration Adapter
Connect a new car stereo and retain OnStar®, RAP, and safety warning chimes in select 2000-05 GM vehicles
Our take on the Metra GMOS-09 Factory Integration Adapter
Metra's GMOS-09 GM radio replacement adapter lets you replace the factory radio in select OnStar-equipped 2000-05 GM vehicles using the existing wiring and connectors. Even if you don't subscribe to OnStar, you'll need this adapter to connect an aftermarket stereo.
Hook the GMOS-09 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. The GMOS-09 also includes the connection you need if you plan to install an aftermarket navigation receiver.
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 2000-05 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: Most vehicles will require additional installation parts please identify your vehicle if you haven’t done so, then check here for a list of parts. You can also call an Advisor for more information.
What's in the box?
Download owner's manual
- GM/OnStar Class II data bus interface (GMOS-09)
- 10-Pin harness with RCA's
- 16-Pin to 32-Pin harness
- Installation Instructions
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Overview: The AXXESS GMOS-09 interface is designed to allow you to
replace the OEM radio with an aftermarket headunit in factory-amplified GM vehicles
equipped with the "Dock-n-Lock" style harness and retain full functionality of
the Onstar system as well as all safety and warning chimes. The GMOS-09 will
also retain the retained accessory power convenience features (R.A.P). This
interface has the capability of adjusting chime and Onstar volumes as well.
Note: Your aftermarket radio must have two pairs of
preamp outputs in order to properly interface with the GMOS-09. If it
doesn't you will need to connect the receiver to a line output converter
(such as item #
142SLC4, sold separately). The GMOS-09 will accept a preamp signal of up
to 4 Volts.
Navigation Compatible: The GMOS-09 also provides Mute, Parking Brake,
VSS or Speed Sense, and a Reverse Output to make installing an aftermarket
Navigation radio simpler and less time consuming.
Vehicle Compatibility: The AXXESS GMOS-09 is compatible with
the select 2000-2005 GM vehicles (with or without Onstar) that use the "Dock-n-Lock
style harness". Please consult the
Crutchfield Car Selector to see if your vehicle is compatible.
Retained Accessory Power (R.A.P.): The ignition power source
of most GM vehicles keeps the radio on until one of the doors is opened. This
feature is called the R.A.P. (retained accessory power). The GMOS-09 is designed
to retain this feature.
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