Metra Metra GM Dock n Lock Data Interface 2000-2005

* Provides accessory power (12-volt 10-amp) * Retains R.A.P. (Retained Accessory Power) * Used in non-amplified systems or when replacing amplified systems * Retains chimes * Provides NAV outputs (parking brake, reverse, mute and speed sense) * Retains OnStar®/OE Bluetooth® * Adjustable gain control for chimes and OnStar® * High-level speaker input * Retains balance and fade * Micro-B USB updatable