GM OnStar/ Chime Retention Interface Harness - GM 2010-up The GMOS-044 is designed toretain OnStar and warning chimes that are normally lost when the OEM radio is removed. Provides a 12 volt accessory output for aftermarket radio operation. The GMOS-044 also provides a Mute, Parking Brake, VSS or speed sense, and a Reverse output to make installing an aftermarket navigation unit simple and less time consuming. This product fits the following vehicles: CHEVROLET Cruze 2011 2012 CHEVROLET Sonic 2012 2012