Provides accessory power (12-volt 10-amp), Retains R.A.P. (Retained Accessory Power), Provides NAV output (parking brake, reverse and speed sense), Retains chimes, Retains audio controls on the steering wheel, Retains OnStar/OEM Bluetooth, Adjustable volume for OnStar, Retains the factory AUX-IN jack, Can be used in non-amplified, or analog/digital amplified models, Retains balance and fade (excluding digital amplified models), Micro-B USB updatable.