Originally Posted By: DeathtoToasters
No cell service, Onstar was broken at the time, when I finally got the onstar working...

Was the service down, or was the Onstar unit in your car not functioning and you somehow got it to function? How did you fix your Onstar at night on a mountain road?

My understanding was that Onstar communicates to the base stations via the cellular connection, and uses that cellular connection to transmit GPS coordinates and other information received from the vehicle. If there was no cell service, how did you contact Onstar?