Metra Electronics GMOS-13 GMOS Interface
Retains Chimes and Accessory Works with or without Onstar and Provides Navigation Wires Use In 2005-2010 Cadillac STS Equipped with Onstar and Amplified System 12-Volt Switched Accessory Output Mute Parking Brake Speed Sense (VSS) and Reverse Outputs For Installation of Aftermarket Navigation Radio