The gmos-06 interface is designed to allow the user to replace the oem radio with an after market unit in amplified gm vehicles and retain full functionality of the onstar systems as well as all saftey and warning chimes. The gmos-06 will also retain the retained accessory power convenience features. This interface has the capability of adjusting chime and onstar volumes as well. In addition to these features the gmos-06 now has the required outputs for the installation of a navigation radio. For 1997-2001 cadillac catera and 1999-2005 deville eldorado and seville. Retains onstar with adjustable level put puts. Retains chimes with adjustable level output. Retains rap. Nevigation outputs now included except 1997-2001 cadillac catera. USB update interface compatible.
