Provides accessory power (12-volt 10-amp)
Retains R.A.P. (Retained Accessory Power)
Used in amplified systems
Retains chimes and balance and fade
Provides NAV outputs (parking brake, reverse, mute and speed sense)
Pre-wired AXSWC harness (AXSWC sold separately)
Retains OnStar®/OE Bluetooth®
Adjustable gain control for chimes and OnStar®
High-level speaker input
USB updatable

AXGM-04 GM Data Interface