http://www.latimes.com/business/la-fi-gm-onstar-20111005,0,4636787.story

The automaker and a small San Francisco company will invite people who own GM vehicles with an OnStar communication system to make their cars available for rental by the hour or day.

By Jerry Hirsch; Los Angeles Times ~ Oct 04, 2011 

In a move that could alter the way cars are rented, General Motors Co. is launching an innovative service that will allow GM auto owners to put their vehicles up for short-term rental.