I have recently purchased a 2004 Escalade EXT.

I live in England.

Can anyone tell me if a DVD for European roads exists for the GPS Navigation system and if so where to purchase & how much ?

Does anyone have one working in an Escalade in Europe ?

I have read that the Navigation system oem for previous years was Denso - is this true for 2004's as I cant find any reference to Navigation systems on their website ?

Any help greatly appreciated !!!