Check the listing for details. Axxess AXGM-16 OnStar Radio Replacement Interface Module for Select Cadillac. Condition: New. Listed at 137.72 USD. This vehicle-specific interface is designed for use when installing an aftermarket radio. It features simple installation and retains OnStar® functionality, chimes, balance and fade, and R.A.P. (retained accessory power). It also provides NAV outputs, including parking brake, reverse, speed sense, and 12-volt 10-amp accessory power. Features: Used in amplified systemsProvides accessory power (12-volt 10-amp)Provides NAV outputs (parking brake, reverse, speed sense)Retains R.A.P. (Retained Accessory Power) featurePrewired AXSWC harness included (AXSWC sold separately)Retains chimesRetains OnStar®/OE Bluetooth®Adjustable volume for chimes and OnStar®High level speakerRetains balance and fadeMicro B USB updatable INTERFACE COMPONENTS: AXGM-16 interfaceLD-GMOS-LAN-26 harnessLD-GMOS-210 harnessLD-2NAV harness Fits:Cadillac Catera 1997-2001CTS 2003-2006Deville 1998-2005Eldorado 1998-2002Seville 1998-2004SRX 2004-2006 RPO U2R , U2S