I couldnt beleive it when I saw that also. I bought the 05 White lux without the nav. The sales guy said they have been installing a 6 disc changer where the Onstar goes..
I had the FX45 before the H2, And the FX had it all
I don't miss the nav. to much but will buy something nav. in the future for the H2.
-SssH2