Aftermark radio & Y91 Bose System

[HumItaly]

Hi, sorry for my english….

i thing i have the bose Y91 system in my hummer H2 2004….
but i don’t can find the correctly Harness to connect a aftermarket radio (JVC KW-AVX800)

Watt is the different to a standard bose system and the premium (Y91)?
(all the harness in ebay function only with standard bose system)

I have already order this harness (http://cgi.ebay.it/Radio-wire-Harness-Hummer-H2-03-04-05_W0QQitemZ200041116015QQihZ010QQcategoryZ32812QQ tcZphotoQQcmdZViewItem)
but no sound come out (the amp not starting)

Please help me