METRA AXGMLN-03 Data Interface 2006-2012

GM Data Interface 2006-2012

The AXXESS AXGMLN-03 data interface enables aftermarket radio installation in select General Motors vehicles from 2006 to 2012. It retains factory features such as OnStar, OE Bluetooth, chimes and balance and fade controls. The module provides accessory power at 12 volts and 10 amps while preserving Retained Accessory Power. It is designed for non-amplified systems or when replacing an amplified system.

Thermals noise and power draw

The interface draws up to 10 amps at 12 volts to supply accessory power to the new head unit. No cooling fan or active thermal management is present, so operation is silent. Power consumption scales with the connected radio and retained features such as chimes and OnStar audio. The pre-wired AXSWC harness simplifies connection without adding electrical load.

Sustained load behaviour

Under continuous use the module maintains steady accessory power and NAV outputs including parking brake, reverse, mute and speed sense. Adjustable gain control keeps chime and OnStar volumes stable during long drives. USB updatable firmware allows future compatibility improvements without hardware changes. High-level speaker inputs handle extended signal passage without degradation.