Provides accessory power (12-volt 10-amp) Maintains the retained accessory power (R.A.P.) feature Can be used in non-amplified, or analog/digital amplified models Retains warning chimes Provides NAV outputs (parking brake, reverse, speed sense) Pre-wired ASWC-1 harness (ASWC-1 sold separately) Retains OnStar/OE Bluetooth Adjustable volume for chimes and OnStar Retains balance and fade (1) Retains RSE (rear seat entertainment) (2) Retains SAT (satellite radio) Micro “B” USB updatable