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I'm new to site and wanted to say hello and also ask for some advice. I have a 2003 Trailblazer LS (non bose / non on-star / no navigation). I just bought a new head unit and want to try the install myself.

I've searched this forum for some good advice but I'm kinda confused. I've ordered the GMRC-01 harness, antenna adapter and mounting kit. Is this all I need? I've read in this forum that I might need 2 harnesses (1 for H.U. and 1 for steering control. Is this true? that harness is not cheap by any means.

Thank you in advanced.

Oh and I don't have steering wheel controls for the radio.
 
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