The PAC Audio NAV-1129 interface is a multi-purpose, multi-vehicle installation accessory. This interface is compatible with 2006 and newer GM vehicles using the GMLAN Data bus. The provided output signals are vehicle speed sense (VSS), reverse output, parking brake on/off, and retained accessory power (RAP).

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On May-07-09 at 15:16:18 PDT, seller added the following information: