Axxess AXDI-GMLN9 Chime Retention Data Interface for Select 2014-Up GM VehiclesBRAND NEW AXXESS AXDI GMLN9 Chime Retention Data Interface for Select 2014 Up GM Vehicles Key Features: Provides accessory power (12 volt 10 amp) Retains R. A. P. (Retained Accessory Power) Provides wires for multimedia radios (park brake, reverse, speed sense) Used in non amplified models, or when bypassing a factory amplifier Used in models without OnStar or when not retaining OnStar Retains all warning chimes High level speaker input Retains