Pac AAI-GM24 Auxiliary Input Interface AAIGM24 The AAI-GM24 is a standalone auxiliary input for most 2003-2005 GM vehicles. Even works with vehicles that do not come with factory XM, factory DVD or factory external CD changer. The AAI-GM24 will have two auxiliary inputs selectable by the headunit's button. works in most vehicles with the factory 6 disc in-dash head units. The AAI-GM24 aux input is the first in the industry to use the steering wheel or radio buttons to send out commands to PAC's optional SWI-X which can be used to control an MP3 player, DVD, VCP or most devices that use an infrared remote. Note: The AAI-GM24 will not work for 2000-2003 TrailBlazer, Envoy or Bravada, 2003-2004 S10 and 2003-2005 SSR.