Metra GMOS-01 Onstar Class II Data Bus Interface for Non-Amplified Audio Systems

The GMOS-01 interface is designed to allow you to install an aftermarket radio and have it interface with the OEM vehicle and OnStar system. The GMOS-01 is designed for 2000 and Up GM vehicles that use the GM Class II data bus system. The interface retains full functionality of the OnStar system as well as all safety and warning chimes.

The GMOS-01 also retains the R.A.P or retained accessory power convenience feature, allowing you to use the radio after the vehicle is turned off as long as you don't open the doors. 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.

• Easily remove the factory stereo in an otherwise impossible situation and replace it with an aftermarket stereo and retain all of the factory functions
• Provides accessory (12-volt 10-amp)
• Retains R.A.P. (retained accessory power)
• Used in non-amplified audio systems
• Retains chimes
• Provides NAV outputs (parking brake, reverse, mute, V.S.S.)
• ASWC-1 harness included (ASWC-1 not included)
• Adjustable volume for chimes and OnStar
• Interface is designed for non-amplified audio systems
• High level speaker input
• USB updatable
• Retains balance and fade

• Yellow – 12V Constant
• Red – 12V Accessory
• Black - Ground
• Orange/White – Dash Light Dimmer/Illumination
• Blue/White – Amplifier turn on
• Brown - Mute connection
• Light green – (-) Parking brake lead
• Blue/Pink – VSS (Vehicle speed sensor)
• Black/Yellow - OnStar volume adjustment
• White RCA - Left Auxiliary input
• Red RCA - Right Auxiliary input
• Green/Purple – (+) Reverse trigger
• Green – Left Rear Speaker (+)
• Green with Black Stripe Left Rear Speaker (-)
• White – Left Front Speaker (+)
• White with Black Stripe – Left Front Speaker (-)
• Purple – Right Rear Speaker (+)
• Purple with Black Stripe – Right Rear Speaker (-)
• Gray – Right Front Speaker (+)
• Gray with Black Stripe – Right Front Speaker (-)

• Allure 2005 - 2009
• Century 2004 - 2005
• LaCrosse 2005 - 2009
• Rainer 2004 - 2007
• Regal 2004
• Rendezvous 2002 - 2007
• Terraza 2005 - 2008

• Escalade 2003 - 2006
• Escalade ESV / EXT 2003 - 2006

• Avalanche 2003 - 2006
• Cavalier 2000 - 2005
• Colorado 2004 - and Up
• Corvette 2005 - and Up
• Impala 2000 - 2005
• Malibu 2000 - 2003
• Malibu Classic 2004
• Monte Carlo 2000 - 2005
• Silverado 2003 - 2006
• Silverado Classic 2007
• SSR 2003 - 2006
• Suburban 2003 - 2006
• Tahoe 2003 - 2006
• Trailblazer 2003 - 2006
• Uplander 2005 - 2008
• Venture 2000 - 2005

• Canyon 2004 - and Up
• Envoy 2002 - 2009
• Sierra 2003 - 2006
• Sierra Classic 2007
• Yukon 2003 - 2006
• Yukon Denali 2003 - 2006
• Yukon XL 2003 - 2006

• H2 2003 - 2007
• H3 2006 - 2009

• Ascender 2003 - 2008
• I-Series 2006 - 2008

• Alero 2001 - 2004
• Bravada 2002 - 2005
• Intrigue 2002
• Silhouette 2000 - 2004

• Aztec 2001 - 2005
• Grand Am 2001 - 2005
• Grand Prix 2004 - 2008
• Montana 2000 - 2005
• Sunfire 2000 - 2005

• 9-7x 2005 - 2009

• Relay 2005 - 2007