First of all, apologies to the admin if a live topic exists.

I bought a 2nd hand Isuzu Alterra and the OEM Head Unit that comes with it is GPS-ready/compatible. However, the SD Card for the GPS didn't come with the vehicle. I have Waze and Google Map in my smart phone but I really wanted sana to make full use of the HU and utilize its GPS function. Has anyone tried this? Where to download software and/or maps?
Thanks!