If you don't have the BB Maps app at all, I would suggest starting with either BlackBerry
or m.blackberry.com and download it first. It should be present after you make sure you even have the app. If not, I would then try to re-send the service books, and see if it shows up. I know for a fact it wasn't included with my stock OS and ultimately not included when I upgraded to .190 w/backup. I couldn't even find it listed as having it on DM. I don't recall having to send the service books though, so start with checking to see if you even have it, then download it.