GM's Maven is basically the equivalent of a car rental service; for a fee, users can borrow a loaded GM vehicle for up to 28 days at a time. Now, it appears that GM may be looking to expand the service. According to Bloomberg, GM will operate pilot program this summer to test allowing GM users to rent out their personal vehicles through Maven. Annalisa Esposito Bluhm from Maven Communications, told us, ""At Maven, we are always considering new, innovative ways to make sharing easier. We have no plans to announce at this time," in regard to our carsharing inquiry.