2005 CTS-V Stealth Gray stock (unmodded and happy this way)
Not a fool proof method... I twice locked my keys in the V. The first time I discovered it immediately and OnStar was able to unlock the doors. The second time it was a few hours until I discovered it. OnStar was unsuccessful in unlocking the doors. The agent explained that this can happen because as the car sits with no active electrical power (as opposed to passive, meaning minimal power to operate the various control modules) the satellite connection can be disrupted. I didn't totally buy that explanation but OnStar could not unlock the doors so somehow their satellite signal had been disrupted.If you had Onstar couldn't they unlock the doors?