Hey guys, just want to say hello on my first post on the TrailVoy page , I just recently bought my 2005 chevy trailblazer LT and I'm enjoying it very much , I just had on question , I truck came with the Bose system but no navi , is there a website or can I install a OEM navigation head unit with the Bose amp ? and if yes, where can I buy it ?? Thanks so much guy have a great day !!!