CAUTION! All accessories, switches, climatecontrols panels, and especially air bag indicatorlights must be connected before cycling theignition. Also, do not remove the factory radiowith the key in the on position, or while thevehicle is running.AX-ADGM03I N S TA L L AT I O N I N S T R U C T I O N SAxxessInterfaces.com © COPYRIGHT 2018 METRA ELECTRONICS CORPORATION REV. 7/2/18 INSTAX-ADGM03INTERFACE FEATURESINTRODUCTIONTOOLS REQUIRED• Crimping tool and connectors, or solder gun, solder,and heat shrink • Small flat-blade screwdriver• Tape • Wire cutter • Zip tiesTABLE OF CONTENTSConnections to be madeFor models without an amplifier ................... 3-4For models with an analog amplifier ............4-5For models with a digital amplifier ...................612-pin pre-wired ASWC-1 harness......................7DIN jack ................................................................7Installing & programming the AX-ADGM03AX-ADBOX1 ...........................................................8AX-ADBOX2 ......................................................8-9Adjusting the AX-ADGM03................................... 10Extra features ................................................... 10-11GM Data Interface 2000-2013APPLICATIONSSee inside front cover• Provides accessory power (12-volt 10-amp)• Maintains the retained accessory power(R.A.P.) feature• Provides NAV outputs (parking brake,reverse, speed sense)• Retains chimes• Retains OnStar / OE Bluetooth• Adjustable OnStar level• Retains RSE (rear seat entertainment) *• Retains satellite radio• Retains the factory AUX-IN jack• Pre-wired ASWC-1 harness (ASWC-1 soldseparately)• Can be used in non-amplified, or analog/digital amplified models• Retains balance and fade†• Micro “B” USB updatableThe AX-ADGM03 harness is designed for, and must be used with, theAX-ADBOX1 or AX-ADBOX2 interface (sold separately). Please refer to theAX-ADBOX1 or AX-ADBOX2 for the 16-pin connector with stripped leads.* Only for models that have the RSE controlled through the factory radio. Not for models that have an external power button at the RSE.† To retain fade in digital amplified models, use the AX-ADBOX1INTERFACE COMPONENTS• AX-ADGM03 harness • 4-pin to 4-pin resistor pad harness