Peripheral PGHGM5 PXAMG Vehicle Harness for GM Class-2 Vehicles Radio must have a "Band" or "XM" button to be compatible Not compatible in vehicles equipped with "Monsoon" system or any other "signal sensing" amplifier. When using the PGHGM5: Some radios may have an inactive satellite radio port if not equipped with a factory satellite radio tuner. Please see a dealer for activation of this port to enable the interface When installing the PXAMG Gateway adapter into select GM Class-II Radios with -InchBAND-Inch button (satellite radio ready) When using the PGHGM5 harness, the radio must have a &quot;BAND&quot; and or &quot;XM&quot; button to be compatible.