factory Nav

I have an 05 TB LS and I want to put the factory nav unit in it.  It does not have the bose radio.  I only want the factory I do not want any aftermarket.  What one do I buy?  How hard is it?  Any help would be great.

Your best bet would to go on ebay for this.  There are a couple of guys who are selling them because they have the aftermarket ones.  Find out if they have the CD included with the radio.  Here is a start:
 
http://cgi.ebay.com/ebaymotors/GM-HUMMER-H2-DENALI-TRAILBLAZER-TAHOE-NAVIGATION-RADIO_W0QQcmdZViewItemQQcategoryZ38653QQitemZ220093818069QQrdZ1QQsspagenameZWD1V