[Bitchin' Camaro]

Yeah, I'd like to figure it out too. I have Onstar, full XM and no Nav. No speed limit sign in the HUD or any other display. (OK, so we hijacked this one..).

In my HUD I get 4 displays that I can think of: veh speed only, veh speed with a little circle around a triangle (compass? and I think this is the display that would show nav), veh speed and audio, and veh speed/tach.

I haven't done anything with Onstar aside from the initial set up at the dealer. I did finally download the app to my phone, but don't even know the pin code to use the lock/unlock feature.