Question About Hertz H2

[surf twang]

I've been looking at a 2007 H2 at the local Hertz sales office. It has the Hertz navigation system which they are going to remove. It also has what looks like a factory navigation system but of course the sales people do not know anything about Hummers. They didn't have a navigation DVD. I had the salesman get the build sheets and it states that this H2 has option UMB (or UM8) NAVIGATION RADIO INCLUDES TWO (then it's cut off).

Based on this entry on the build sheet, does anyone know if this H2 has the factory navigation system? Thanks.