Mapping Disc?

I recently purchased a GM factory Nav head unit for my 03 yukon (joystick type) and I need to buy the maps CD for the unit. There are way too many versions out there, question is will any of these CD's work on this unit? Or do I need a specific part number/version number?

The HU is for the non-lux, w/ bose setup w/ the UQ7 amp (I believe its GM PN# 15800000)

Here's the auction on the Nav:

http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&rd=1&item=160268954272&ssPageName=STRK:MEWN:IT&ih=006

Thanks in advance