inputs.text: outstanding product amazon customer support no support simplesoft - installed systehem 2011 silverado lt nonbose xmsirrus steering wheel controlslike reviews installation plug play took 20 min trim rehemoval wire connectionsthe gps antenna easy install put mine underneath defroster trim panel front windowthe xm radio took one phone call set upthe systehem overall easy operate dvd functions easy use picture quality actually pretty good radio reception good navigation pretty accurate points interest maps needs updatedthe minor issues not come manuals intallation operations manual door lock chime lost installation using steering wheel controls able page local radio presets satellite radio not page presets locating users manual simplesofts website not painful updating maps naviextras website little challenging not terrible read everything not way bluetooth mp3s navigation unitthe thing serious problehem simplesofts customer service nonexistent problehems navigation portion unit could not find number contact simplesoft spoke amazon support awsome also could not find number simplesoft either sent several ehemails simplesofts customer support still not heard back thehem finally able figure fix problehems might able save couple day troubleshooting could got supportoverall product outstanding upgrade basic factory stereo systehem not expect help simplesoft run problehems work amazons folks try exchange would rated 5 stars product actually really good simplesoft customer service extrehemely poor hence rating would recommend product installation know