Amplifier Interface Harness. Retains Chimes and Accessory. Works With or Without OnStar, and Provides Navigation Wires.
The GMOS-13 is designed to be used in the 2005-10 Cadillac STS equipped with OnStar and amplified system. It will retain the warning chimes that are lost when the factory radio is removed. The GMOS-13 also provides a 12-volt switched accessory output along with Mute, Parking Brake, Speed Sense (VSS), and Reverse outputs for the installation of an aftermarket navigation radio.