My CUE navigation still works after onstar went off line. I don't believe the resident navigation (if your car is equipped with it) is dependent upon On Star.
Same here, my resident CUE navigation still works and I do have the siirus XM traffice and weather that still works. I think it's $5.99 per month.The GPS in my 2014 still works, but the traffic and weather features don't since they can't get live updates now that 2G has been disabled. My understanding is that there is an option through SiriusXM to get traffic and weather updates but honestly I just use Waze on my phone since I prefer it over the GPS in the car so I don't pay extra for that upgraded service through SiriusXM.