If this is a North America vehicle imported to South America, the APIM will not have enough storage for the maps, since you will require ROW region navigation. Regardless, there are several threads on this forum you should read first before attempting installing maps on a NON-NAV unit, which is not recommended. The threads below are for cutting down maps to fit on NAV units, but contain information needed if you decide to do this on your own.
Remember, you must maintain about 3GB of free space on the APIM for future updates, etc. So in your case you only have 4GB free space on the unit. Deleting Gracenotes will help some, but very little.
Obtaining a replacement unit with navigation would be a better solution. Just swap it in with the asbuilt programmed.